@adam44 is correct. This is a reference to Endgame where he plans to “shred the universe to atoms” not Infinity War where he kills half the population. I’m not sure where that puts him on the evil scale compared to God. Thanos was at least trying to create a utopia whereas the God is mostly pissed off and vengeful.
God reset it all to two members of each population.
At least Thanos let half the total population live