What's the point of loadouts if I never get to pick any

Title pretty much sums it up. 100% of my games after patch I have been inserted into a lobby with 10 seconds to go. No starting vote(barely a chance to see what’s the mission-luckily I know them all now), zero opportunity to change my class based on what other people are brining.

My ONLY option if I see everyone is bringing carbine and shotgun us to leave the lobby. This screws over the fireteam with a man down but I can tell by the loadouts everyone will get rekt any ways…

So either give me an option before starting a lobby to have a preferred loadout, otherwise I just have to keep changing 1st loadout. ENTIRELY DEFEATING THE POINT OF 6 LOADOUTS! Or fix your match making. 30 seconds AFTER last to join start the match…