Daniel Brühl's Baron Zemo wanted there to not be superheroes because he felt they were dangerous and unchecked, and also wanted revenge for them causing the accidental death of his family during their heroic shenanigans.

Plenty of the villains are not helllbent on dominating anything. Heck, one of the most recent ones just wants to destroy the gods that do dominate everything, but not to take over for them.

That user just said some blanket nonsense because they don't like MCU, but haven't actually seen the movies so their opinion is based on thin air.