Superman beats the living crap out of Thanos. The people who say Thanos would win are the same kids who think that Thanos can beat Ronan with the power gem. It's just not happening. He's a cool villain and all but he is nowhere near as strong as people would like him to be. The guy pretty much lost to the weaker half of the super heroes on Titan with 4 infinity stones, not only that, the stone that Dr Strange had was not even used.