If Thanos defeat (Thanos being more powerful of course than-) the 2nd most powerful being in the Omniverse what would that make you?
That isn't really relevant to your point since this doesn't prove in any way Thanos even comes close to The Presence , which he shouldn't and doesn't .
That's right, Thanos was God, Thanos needs as much feats as the Presence need.
Oh, Thanos was also omnipotent, omnipesent and so forth.
He could do anything.
Maybe the God of the respective Multiverse but in no way God of the Omniverse , especially when in many instances in the story it has been reffered to Thanos affecting the Universe . At best , it could reffer to the Alternate Earths and Timelines of that Universe , thus affecting a Multiverse but no more . It all makes sense if you actually think a bit , especially considering that we haven't seen anything appear except from Earth 616's Multiverse 😉