Right before cull gets smashed by Ant-Man he is being blasted by uronman. The blast are burning straight through him but he appears to be instantly healing. I watched it multiple times. It looks like it was made on purpose. I thought it was an editing error at first but even in culls previous fights he would be blasted and his skin looked red hot and burning but it would be gone almost immediately.
In infinity war they almost all won their fights against the heroes. Corvus and proxima both almost killed multiple avengers. Cull was beating Ironman and hulk buster. Maw straight up beat Dr. Strange. In Endgame they where not important to the story. They nearly all lost in sneak attack ways. Not by fighting.
Guardians 3 should start with a workout montage too some catchy tunes. Both of them are getting back in shape. Starlord is using a Bowflex while Thor is lifting massive objects. Starlord looks at him feeling Insecure. They can work that funny angle from infinity war where Peter feels inferior to the godman.