if it’s not the loading screen it’s the silly intro slowing down the start of the game, people don’t play multiplayer games to look at pretty cinematics that’s for singleplayer campaign.
I’m also tired of the black screens.
CAN WE JUST PLAY THE DAMN GAME ALREADY?
The intro is pointless too. It doesn’t let you check their profile or potential skill. All it shows is how many vanilla armor permutations and how many spenders you have on your squad.
I think, in general, loading the map and game takes too long, so until they can optimize loading times, it will take some time. I don’t know enough how that part works, so I usually stay quiet on that aspect
It lets people show off their store purchases 
That’s an interesting point. Especially in ranked, I’d love it if that screen showed me their ranking info.