After he took the Heart of the Universe, wasn't there still a Multiverse so the One Above All still ruled over all the multiverse and Thanos just took over the ordinary Marvel Universe?

I really liked Marvel The End to start but buy he time it was over I HATED it. He just usurped Godhood with nobody at the top. Anyone else think maybe The One Above All is God of the Multiverse instead of just the one Marvel Universe?