Poll - How will Thanos be defeated in Infinity War?

I'm still trying to figure out how the hell Tristan Paste-Eater thinks he can justify saying that Tony's breakdown at the end of Civil War is anywhere near as bad as that. The MCU films aren't hard to understand, so I'm not seeing how he's missed Tony's life slowly becoming a bigger and bigger mess starting from Ironman 3-onward. You don't even need to watch as far as Civil War to see how Tony's paranoia and obsession is starting to strain his relationships with the people in his life as well as his sanity. You need only to watch Age of Ultron to understand he is not a stable man from the moment Civil War begins, and then he spends the entirety of that film having bad things happen to him culminating in the revelation that his parents were murdered in cold blood.