Haven't seen the anime, read the first few chapters of the manga way back
From what it sounds like, Black Clover isn't necessarily bad, just not original enough. I haven't heard of any of the other major shonen titles facing the kind of comparison Black Clover is facing right now. Seven Deadly Sins and My Hero Academia don't do anything all that new, but they didn't see these arguments. Kimetsu no Yaiba likely won't see these arguments.