Plus, let’s not forget that on top of his strength, Thanos is also a smart cookie.
So if necessary, Thanos could outthink his opponent to work his way to victory.
Even though Thor: Ragnarok gave us a Hulk who was more mentally developed compared to the earlier movies, he still came across as childish.
Hulk is obviously no pushover either, but as the Russos laid it out to HeyUGuys, if the Green Goliath and the Mad Titan crossed paths on the battlefield, the latter would be the victor.