The Thing gets BODIED by Thor. Absolutely BODIED. I don't even dive the backline anymore. He is one of the most defenseless tanks. Tons of HP, but most of the time they use their mobility to go in. Meanwhile thor puts out 500 damage every 2 seconds and cant miss vs him.
Thor is definitely a hard counter to rock boy, mainly because if the thing dives, which is basically what he is designed to do, his healers must move up since he isn't mobile. Healers moving up into a thor is SUICIDE. Even a rocket can get bodied in 2 seconds.