Endgame was packed as fuck.
Cap picking up Mjolnir is one of a dozen scenes that "had to happen eventually" and it happend in a packed as fuck movie, and it was done quite well, exceptionally well if you ask me, all things considered. The picking up of Mjolnir has not been that big of a deal ever since Vision did it in Ultron and Hela smashed it into pieces in Ragnarok.
Cap picking up Mjolnir is just one of the many things that had to happen in one movie, that had to include shit from movies spanning 10 years. Its a lot.
Aaaaand regardless of these things, it was still a great scene that got rightfully acknowledged by 99% of movie goers except JB and uh, I guess Zack Snyder DCEU stans, I don't know. And people who will shit on the MCU no matter what.
So you're wrong, but it's ok to be wrong sometimes. You can only grow from mistakes, like this thread.
Edit: but visuals specifically? Like quality wise? The visuals in almost all MCU movies are pretty mediocre though with some highlights here and there. I wish they didn't cheap out on CGI as often as they did.