I know it seems crazy, but anyway I'll ask. In the middle of Infinity war, Thanos beats Guardians and teleports with Gamora. After that, they had a conversation:
Gamora: I was a child when you took me.
Thanos: I saved you.
Gamora: No, no, we were happy on my home planet.
Thanos: Going to bed hungry, scrounging for scraps? Your planet was on the brink of collapse. I was the one who stopped that. You know what's happened since then? The children born have known nothing but full bellies and clear skies. It's a paradise.
So, Thanos spends his time, trying to make world better?