Watched this for the 2nd time last night, and... it's really kind of slow. All that down time being sad in the post-snap world... the time travel stuff was only moderately engaging, with so much time spent on schmaltzy "talk with loved ones"... then finally, the big battle.
Question: how far back in time did Cap go to be with Peggy? Clearly looks like the 50's. Where'd he get the extra juice to get there? Did he NOT replace the PIM juice like he said he would? So he lied? Cap lied?
Also, if he went back to the 50's (let's say 1955) and the current time in Endgame is 2026 (is that right?), then for him its been 71 years when they find him on that bench... PLUS add his age when he went back in time (say 35)... so he's at least around 106 years old on that bench?
Well, Hank Pym is alive again after Tony's snap, so making more Pym particles should have no longer been a problem. I think we are to assume that they provided Cap with more than enough vials to make all the jumps required (and then some JIC) before he left.