How the whole story revolves around cultivation. Yes, I know, cultivation makes you stronger, but there's more to life than this. Studying, eating healthy food and exercising, makes us stronger and smarter, but do our lives revolve around such things? No!
MC seems to never feel the need for good food, friends — real friends, not people the MC meets, talks to for 10 chapters and then they are never seen again — and most important, sex.
Seriously, it seems only villains care for the last one and of course, as they're vilains, they all need to be sexual predators, taking whoever they want with no consequences.