Personally, I found the very beginning of the battle of Wakanda to be the most upsetting scene in Infinity War. The Avengers know they’re going to need all the help they can get, and I’m sure many of them are upset that Tony wasn’t there for them when they needed him most. What they don’t know is that Tony was giving everything he had to defeated Thanos on his own. So while the rest of Earth’s greatest defenders stand side by side, Tony’s worst fear was coming true above them: he’d be left without his friends. Who knows if they’ll ever know the sacrifices he’s made for them.