After the end of Avengers:Endgame, Tony Stark was in critical condition after his snap. With Tony stuck in some sort of coma, Peter struggles with guilt and anxiety from the battles of Infinity War and Endgame.
Events of Too Little Too Late from Tony Stark point of view.
Tony is going through depression throughout the begining. He will have suicidal thoughts. I don't think it is too graphic but he wil be better in the end.