I'm always amazed by people saying Superman can't hurt, or would barely hurt Thanos, considering that arguably Superman's most powerful weapon is his physical strength, which in even weaker forms has allowed him to take on actual angels, gods, demons and to move celestial objects.
Not to mention punching power that even while being absorbed could still be felt miles away.
Not saying he'd win, but saying he's incapable of actually physically matching or competing with someone like Thanos seems to me to be either just bias, hate, or misinformation.