Review Detail of Sir_Arthus in As An Immortal, I Only Learn Forbidden Skills

I honestly have to say I enjoyed the first ~250 chapters a lot. The MC was quite considered especially to non cultivators, didn't take stupid risks and overall enjoyed his life while getting slowly stronger over time (and time he has seemingly an infinite amount of). Some chapters after leaving the mortal world (which I have to add made no sense, because earlier it was established he was "invincible" there and so he achieved his goal to be able to life a quiet life no matter what would happen, and so of course he left because he wants to become an immortal... Excuse me what?? he already is immortal but oh well), the story degraded into the typical cultivation bullshit of this website. The MC is suddenly surrounded by suicidal and plain evil people which therefore degrade the story into a stupid slaughter fest... Of course the MC finds some "invincible" technique which makes all his previously hard earned progression through puzzling together different techniques and kinda finding his own path completely worthless. Overall, even though I enjoyed the mystery aspect of the world building, due to the inconsistency of the mc this Novel is a complete waist of time!