A very strong example is the life and death trial in the side world, where a lot of side characters previously vigorously (like reaaaaally too much!) put on the front by the author (Si Chuan, Lei Zhen, the useless jealous guy over Jia Lan in the entrance popped out of nowhere...) get killed without actual impact on the story.
You also have the episode with Liu Ming going to the Bai clan for the first time where most of the time was given to useless chatter between side characters, very little to the impression and/or suspicion (Ex: you just get later that he figured out the old lady was hidden nearby without even a hint of it, or the usual glinting eye) of Liu Ming.
Then the first story with the scarlet dragon being mentioned again and again, no real impact on the various sects, just to just end meeting his death in a weakened state to Liu Ming.
When you create a whole martially useless tournament to make couples of most characcters I can't say you're not biased !
Same for Wang Qiu'er, came from nowhere just to serve as pitiful, sadistic contrast to the lead girl. No reason or enough time to fall in love, but she did, exactly when the MC was struggling for his girl. MC never felt tempted but the author pointlessly kept her and some pseudo ambiguousness in the picture just so he could later write a grand feelings combing festival in a valley for everyone (even spirits lol).
That being said, the immolation of Qiu'er later was spectacular, a perfect extrication !
Especially when the author tries to paint the MC as a dominant character and at the same time wants him to be considerate of others feelings, you start perceiving some creaking. Then comes the little trick the author uses for pacing and delaying, the famous 'if someone doesn't want to say things one cannot force it'. Nicely done at first but if used too much, every time one actually want to understand (get the fact that this way doesn't give you that much of a clue to ponder on right?) you find yourself considering even the relevant events in between like randomly popping stuff. You also have the way actual discussion kept been avoided for a long time between MC and Legal Wife, although the setting was on point, considering it takes time to read, the cold war should have been a bit less (and I'm even reading after completion, cannot imagine those who actually followed the original release). It's alright to want your MC to be OP yet not absolute (god for so long, seemingly absolute since there's no actual cultivation or even periodic training) and then appears suddenly stronger than gods which get your MC yearning but because one need luck and sudden enlightenment so it's useless to train? And when you say he has a huge organisation without ever mentioning the size or even making use of it when needed (only to steal a bride so far and never to prevent the overly occurring kidnapping of his relatives) pretexting a peaceful life while also stacking up weaknesses (lovers, parents...) and bringing frequently trouble to his door, I don't really want to be annoyed but I am.
I felt the story too conflict centered, with quite an annoying pattern. The MC rarely is left alone to introspect and grow. He only goes from places to places to get whatever ressource he needs at the moment, and somehow, he's always followed or preceded by every significant people or powers of the story (whether they are locals or completely on the OTHER SIDE of the map) so that conflict may occur. As if the side characters only exist where and when the MC is around. Anything they could've lived, and would thicken the story, while allowing the MC to actually cultivate, is thrown as info dump!
Speaking about MC cultivation, it's quite unrealistic to read that he barely closes up for more than few weeks and then he can't progress anymore "daily sitting in boredom", so he needs another pointless conflict (as if he couldn't go fight strong demonic beast instead of annoying people he shouldn't even be able to contact with his current level), while the side characters have years of actual cultivation and training and end up eating dust. There's also the complete lack of rigueur with the cultivation realms, and the ever "stronger and more perfect, without a flaw" slogan, at every breakthrough, without actual substance. Almost at the last known realm of cultivation and the MC still fights like before.