1) The protagonist slows down in creating skills, he obtains like 10 in the first year of life and 3 in the two afterwards.

2) A young noble takes a fancy to the mother of the protagonist (A RANKED ADVENTURER, A RANKED), he then proceed to threaten the father (A RANKED ADVENTURER) and not only the father does not go to the guild (for some s*upid reason like "the receptionist worked as a maid at the noble's residence"), he chickens out and does not decide what to do until a big event. He doesn't even try to run away from the city because "the guards have been told to stop your wife", A FRICKIN A RANKED ADVENTURER, and without any reason he believes it. Can you not even disguise her, you brain for shi*s?

3) The author then proceeds to kill the two parents like two chapters after, then casually a frigging spirit appears out of nowhere (spirits are supposed to be this awesome strange hidden race and this one is also supposedly still sealed) and asks the idiot MC to help him, simply because he has a lot of Magic Power. Let me repeat, he asks a kid to defeat a Level f*ck*n 95 Dragon after training for what is practically 10 years of training in a Chamber of Space & Time (Only 2 and a bit passes in the outside world for the simple reason of having the maid still look childish, probably).

4) The MC accepts.

5) The MC actually manages to defeat the dragon in a battle worth of being in the "Invisible Dragon II"

Just like the protagonist's father.

even going as far as to bring in his own version of a hyperbolic time chamber, and nonchalantly giving the MC the ability to buy things from other world, almost as an afterthought. And more.

The MC has a cheat like skill called 'Creation' using which he can create skills. So the MC creates some powerful skills with it and thinks that the people will freak out if they knew he has such skills and decides to hide certain skills. This is acceptable but what I think is s*upid of MC is that he doesn't hide his 'Creation' skill which is more eye catching than the rest. I mean even a normal person can tell that that skill is trouble.

An evil noble who is after his mother has his father killed. Normally this would lead to some kind of revenge story but instead his mother deals with it herself by blowing herself up in a magic su*cide attack that suddenly kills the noble and everyone else in that city. It's a real 'WTF' moment and when MC learns about it he's full of rage but there isn't anything he can do because the ones responsible are already dead.

When MC reunites with a pair of women from his childhood after 2 years, they turn against him because they've been charmed by a conman who wants to trick them and turn them into s*aves. MC abandons them and simply walks away in disgust after warning the conman not to come after him or his new female companion.

The conman successfully ens*aves the 2 women (who are remorseful for not listening to MC) and then decides to go after the MC anyway. Normally this would lead to an arc where MC beats the conman and rescues his 2 former friends but instead we find out later that they escaped without his help when the conman ran afoul of some imperial assassins.