But the thing is, he’s not just some overpowers guy with no combat experience like Homelander (which yes I did this with him before)
He knows how to fight and has literally killed off planets
Canonically? No, the most he has done was destroy a military force…
And even if so, Omni Man is so brutal that he probably WOULD kill the collector 100% just because he has so much combat experience and that combined with his immense power is just overwhelming for the collector