Where did he get that shield?

Graverobber.

the way they retired him was stupid. its not that people dont get what theyre doing

So the Cap of that timeline is shieldless now.

New actor have to act just like evans. Fans will go not my cap soon.

a lot of people are retarded and think they won't bring back tony stark in ten years when RDJ is not fresh in the normies minds.

I dont think movies will do sliding timeline . Especially when child actors grow up faster than the stories.

It's his own shield, from his unchanged timeline. He retrieved it before he sat on the bench. See