Originally posted by Newjak
I would like to point that you are comparing different power sets and scenarios when you are describing Hulk V Thanos and IM V Thanos.IM wasn't giving Thanos a good challenge by himself. He had a team helping him and their entire plan wasn't to take down Thanos. Just hold him off enough to get him subdued to have the gauntlet removed.
IM was also using every trick in his arsenal to keep himself from getting into a pure fist fight with Thanos. Using his maneuverability to stay safer. In fact when we do see that finally happen Thanos decimates Tony. Yeah he lasted longer than Hulk did but he also had more options to keep from getting steam rolled.
The team fight is when they are trying to execute their plan , After their plan fails , Thanos , first has a solo fight with Dr Strange and after defeating him , a solo fight with Iron Man and Thanos was obviously a lot stronger than Tony , and he had 4 infinity stones so Tony had do use all he has.
In Guardians of the Galaxy we saw that the blast of that Power Stone can disintegrate Aliens and decimate planets , Iron Man was able to block that for a few seconds but eventually the blast and Thanos's fists damaged his suit. We should also consider that his suit had gone through a lot before his fight with Thanos.