Thanos (spoilers)
I loved the way they made Thanos complex in Infinity War. They even added it here by having destroy the stones so he wouldn't be "tempted"
However, when he decides to just "destroy all life and rebuild it" it seems like they jettisoned the complexity to make him a stock villain In fact, it doesn't make sense. He is originally going to destroy half of life in order to preserve it. Now he is going to destroy it, and he's changed his resolution because 5 or 6 terrens Earth are giving him problems. Why doesn't he just get rid of them after he snaps everyone away again?
Could this last version of Thanos fall into the "Marvel villain problem"?