Both being regressors, and sharing the same timeline.

MC gets upset that Tower Master didn't punish those in her faction for their crimes, but yet he himself said he wouldn't be able to kill them (these people are mass mu*derers and cannibals). MC challenges the God that he could do a better job than her, somehow forgetting the fact that his entire life is due to her building the tower for victims of society - he literally wouldn't exist without her. He somehow obtains a godly legendary skill card from her, 'her' existence literally being a fragment of a memory. Yet he still obtains the power of resurrection, now not only can he not die, neither will his followers. It just seemed like a convoluted scenario to give an OP MC even more power to further emphasize that there will be zero consequences for his future actions.

Unlike other's have mentioned, I can somewhat understand the Tower Master's Logic. She has essentially been regressing for eternity, and although she can intervene in someone's life to make it better, she can't make everyone happy so she chose a method of non intervention telling herself that she will repent for the world's flaws herself (i.e. Jesus sacrificing himself for the sins of others'). Whereas MC only has the scope of the tower, she has the scope of thousands of worlds.

The Goblin warrior that he calls his son becomes a constellation, a literal transcendental being, that has lived for centuries and one of the greatest warriors in the history of the goblin race. Yet the immaturity and childlike behavior of this character is like that of a 5 year old child. This guy has literally seen through the laws of the world, but his character's personality gets assassinated due to the author's need for comedic relief.

sacrifuce herself is because she self blame herself for not changing bad events happening??? Like, why doesn't she change it then??? Why does she wants to take the blame and suffer??? Is it because she's a god or smth so she wants to be all benevolent and kind and sh*t so she wants to take responsibility???

Tower master arc suck, it will make your head spin so make sure to turn your brain off for that arc since even the translator have a hard time understanding what is happening.

To be fair, I don't find it wrong for the MC to be obsessed in love. Everyone has different definitions on love, and if you think yours is the best, you might have never understood your own partner, or you might have never dated before.

But men might feel insulted, thinking he turned into a woman's pet or something.

Honestly, Gongja falling in love doesn't make him weaker does it? What's the issue even? It's just some readers projecting their ego on Gongja

Why the heck MC fall in love with Raviel??? It come out of nowhere. AND THEN HE AND SHE IS CHEATING. I hate that. If Raviel is single and even the MC is force himself to love her, it's okay. But Raviel is fiancée of crown prince!

Let's says it's okay to cheating but then the story (in the incomplete book library) will be like :

.... Ravelia that gave all of her heart to crown prince suddenly fell in love with the butler. The butler too. They announced their marriage in 10 days....

What the hell? There is no romance story like that. They are not childhood friend, no hardship together, never talk to each other, barely recognize each other, they have no connection whatsoever! But they suddenly love each other?????? Garbage. And hell, it became that the villainess (Ravelia) is the one who the first to cheating, not the crown prince, because crown prince has not yet met the heroine.

The first arc, AKA, the Demon King Arc was where the story was at its peak. It showcased MC's growth as a person and his qualities. It showed his justice and we also get to see a hint of cunningness. The backstories of each and every character were meaningful and actually emotional.

The Heavenly Demon arc was probably an arc you cannot dislike. It's gloomy, sad, and beautiful. There was a problem though. It tries to give a flurry of different kinds of emotions and expects you to sympathize with them. If you are a normal reader, you probably wouldn't have experienced something terribly harsh (like real terrible beyond what normal people experience). Even so, you could make it out how it feels to experience something harsh. That's being empathetic. The story tries to go beyond that.

And trying too hard only has the opposite effect. When I was reading the parts, it did not feel like - 'ah, that's rough' but rather - 'ah, it could be possible'. Still, it had some fine moments like the death of Heavenly Demon and the final verbal fight. Of course, the relationship between MC and his master is also to be mentioned. They were great.

Now, I'll address the elephant in the room. The third arc. It's terrible. Not just the romance, everything else was equally terrible. Until this point, we had actually great characters but aside from MC's lover, other characters were just not up to the mark. I liked her and MC but the way romance was dropped was something very few liked. From what I could tell, the author probably wanted the arc to just be the romance arc and that ruined it.

I would probably be the last person to call out unrealistic romance but as much as I liked their interactions, I have to admit that the author tried too hard. Everything about the arc has to be about romance. MC's character turned inconsistent. This ruined a good story, (again) at least for me. Even the final fight was lacking in substance (unlike MC vs DemonKing and SwordEmperor vs Heavenly Demon).