Sorry but

I don't like him as a person, but he's an interesting obstacle for the FL. I miss him cuz his presence was much more daunting compared to Isabella.

Just because he’s the antagonist doesn’t mean he’s a badly written character. Many of us don’t support his decisions but we still find him interesting and every manhwa needs an interesting antagonist to help the female lead progress through the story

My comment was directed to "stans", meaning people who support Cesare and his relationship with Ariadne, not people who think he's an interesting character.