To give some perspective the MC mostly just runs around killing people for benefits. The MC also later on dies but his soul escapes and after hundreds of years of eating up other demonic souls somehow transforms into a soul eating monster.

On top of this he choses to cultivate a body cultivation that works in the way that he places his main body into the crust of the world he was born in and slowly absorbs all the worlds energy, eventually leading him to become somewhat of a godlike existence but at the expense of sucking the planet dry thus killing it and everyone who lives of it. So yeah pretty evil MC.

This is also somewhat of the weird part of the story since the first 1/5 of the story is about the MC while the rest of the story is pretty much only about a clone the MC uses to cultivate the mystic arts at the same time.

The MC at one point need to make a pill but has no experience or knowledge with pill making. So to fix this MC's solution is to kidnap a beautiful female from a pill sect and force her to work for him. He doesn't really treat her badly except for the fact that she has to do what he says or die and she is stuck in a cave alone for most of the time, at one time she is left alone for a 100+ years I believe and is eventually set free after he had gotten what he wants.

However somewhere along the way all that mold in the cave probably got to the girl and she fell in love with the MC.

Several hundred years later they reunite and we found out that the girl has always loved MC and been waiting for him, MC is somewhat moved by her dedication and accepts her love but because of cultivation has to leave shortly after getting together with her since you know plot gotta move forward.

So he then leaves again after a short time together and as far as I've read not seen her again for several hundred years

He literally ditches his love interest for decades-centuries at a time. He also encounters a daughter figure, but he effectively robs her of a normal childhood and then abandons her so ruthlessly that you can't help but lose all respect for him as a character.

• His golden finger, the stone bead, allows him to train 1000x faster than everyone else. But after the first technique (the grabbing spell), he never seems to utilize it anymore to -I don't know- master alchemy, master crafting, master the other techniques in the sect. But no, he does not.
• His other golden finger (because one is not enough), the old grandpa Situ Nan, teaches him some OP spells, which results in Wang Lin cultivating the death realm magic. It is so powerful, that he can instantly kill everyone on the same level. It is in fact so powerful, that -after 300 chapters of the MC being virtually undefeated- the author decides to remove it. Lol.
• Every time the author moves to the juicy parts of the story (like cultivating as a mortal, taking another identity,...) there is some arbitrary time limit involved. His avatar has only 30 years to live, Wan-er reincarnates in 19 years, he has three months to cultivate his Celestial Slaughter art,... WHY?!
• Talking about the avatar, the author just decides that the avatar is better than the main body, removes the time-limit and then puts the main body to slumber...
• The MC also does not know what he wants to do. Become immortal? Rescue Situ Nan? Save his family? Save Wan-er? There is no long-term goal involved, the MC just gets dropped random goals, then completes them and gets another.
• The MC has the the ultimate treasure - the stone bead - but instead of just finding the last element (something he easily completed four times before, when he was thousands of times weaker), he post-pones it every. single. time.
• Speaking of Wan-er, this is another wasted development. So much potential for an actual sweet romance, but the MC is "unmoved by women". Guess what? He changes his heart just when Wan-er is dying and gets the sudden new goal of reincarnating her.
• Also about the "unmoved by women" thing. Of course the MC gets involved with another heavenly woman who releases aphrodisiac and then he finally loses his v*rginity. Totally random.
• Did I talk about the world? It is a mess (who would have guessed). There is lots of cruelty behind the scenes (I approve), but also stuff that is really arbitrary. For example the corpse sect, which plays a big role for around ten chapters, only to be instantly forgotten a realm later. Far later it plays a role again, but why waste time with it?
• One thing that really bothers me, is the fact that the MC is so much smarter than everyone else. He plays the 50.000 years old monsters like a fiddle, and they are somehow surprised by his schemes every time.
• Also the whole novel only involves what I call "upwards cultivation". The MC is always in the weaker position. When he is in the stronger position, he doesn't deal with someone weaker, but instead there appears someone that is still stronger. It is as if the weaker cultivators don't play a role anymore.
• About the fights: A mess. Random techniques and treasures thrown around. My recommendation: Skip! It is a waste of time, as the MC always wins.

a) At start everything is good, like every novel we readers are immersed in this new world expecting to read the choices the MC will do to become strong, in one of these choices, he stated to become a bad ass dark character, after becoming a soul who absorbed other souls which I liked it since it was different to most mainstream MC from other novels (remember when I said about Numbers of Novel read?) but later the MC decided to turn back to a nice boy scout. Later Author couldn't decide if make MC good or Tyrant, you cant be both, much less break your own rules and take only a side.

This is why, for me, Leylin Farlier (Warlock on Magus world) is my favorite MC ever!

b) The Dead Wife Plot, I never liked it on ISSTH never liked it on DE and on any other Novel, Author used the dead wife to move the MC by the nose for 1500 chapters, YES the wife comes back in the end, besides the Plot she has no value.

I never understand why Authors do this, if the wife dies MC could just simply Get revenge and move on with their lives, what is the point of this wishful Fulfillment they want to create on every novel, where MC is Living Happily Ever After? Is like this Novel is directed to those Beta Males, NEET, Hikikomoris (insert derogatory of male with with low self-esteem) of all the choices in one. Making guys like me who had many GF at teen, had two marriages and some side Sexfriends baffled with the attachment Author gives to MC's LIs (unless is the first one which betrays, etc. etc.)

C) Relationship with people is good and bad, most of the times BAD, he is good with his teachers, and some followers, but these are just for Word Count Sake, in no time you will be tired of the random gibberish the followers create just to expand the chapters, no wonder this is a 2088 chapter novels I wouldn't complain if it wasn't for....

d) Rushed endings, YES!!!! The Cancer of most Novels out there, the author fills the Novel with thousands of chapters to just finish the most important part of the Novel in less than 2 chapters, many things were solved in a whim and many characters were just mentioned, it just doesn't happens here, it happens everywhere out there.

Working only on those Novels who have a Second Part, or a Related Universe's Novel, but here is not the case.