@oluwaseun7g i think he lived through it. He was present but just hiding during the battle of new work, age of ultron, everything, just older. Yes, that means there were two Steves present at a single time since he got back to Peggy .
Doom coming after those who tampered with the timelines to get their way? I mean this is the most brilliant direction they could have gone in! The overused trope of bringing people back through time manipulation being the centerpiece of Doom's grudge is genius writing!