Unbelievably arrogant in every sense of the word. While swearing how much he loves the girl he is with, and progressing on a journey to revive her, he lounges around in an expensive house, starts taking joy rides in expensive cars, lives with two of his disciples (fangirls) and has very open s*xual relationships with both of them almost any time they see each other. I mean it gets to the point where he is getting blow jobs while walking down the hallway from room A to B. He starts straight up harassing people left and right, acts extremely petty in every situation he finds himself in, and is vulgar and perverted in every interaction he has with any girl he meets regardless of if he is meeting them for the first time or knows them (which is perfectly fine because every girl is automatically head over heels for him the second they lay eyes on him). Honestly you can see the pathetic inferiority complex of the author quite literally written in black and white while reading this worthless garbage.
The author states that Yuuki's control over Chloe is abolished upon his death regardless of if he has given her all the commands or not. Well, Yuuki dies and Chloe revives him, using up the 2nd of 3 commands. Yeah, no. He died, that means she was released, it doesn't matter what was ordered before the death. I'm not buying it.
It had been made known that Rimuru's presence alone can eliminate the 'bugs' Yuuki uses to control people... yet he is in the same room as the emperor and all of a sudden, his aura doesn't dispel the thought control anymore. The emperor still acts according to Yuuki's thought manipulation bug that had been previously placed on him.
Rimuru can accelerate his thought process to 1, 000, 000 times the norm. That means that for him, one second in real time is perceived as 11 and 1/2 days. Yes. 11 and 1/2 DAYS per second. Yet Yuuki can run across a room, yell a bunch of lines, and activate a skill while Rimuru is just seemingly standing by in the room as if in a daze, unable to react. This is ridiculous. Why not just omit everything and say a unicorn appeared and brought about Armageddon. Honestly that would have been more believable.