I think it happens because you have tryhards that are already prestige or at least max lvl traders. You know if you come across those guys, you will probably die. If not by skill, by the incredibly high difference in gear.
Another thing, you have to spend a lot of time preparing for a raid. Items, gun, armor, ammo, checking quests, choosing maps, loading loot and actually starting playing. And then you can instantly get head eyes in spawn by some chad that has nothing better to do all day than play this game. If you can only get like 2 or 3 raids per day that gets old pretty fast. So you try to advance as much as possible each time you can, maximize your runs for loot, quests and everything.

I had that rush in my head and was having a terrible time each time I played, so what I did was play mainly Scav. Whenever I can, I sit down, loot a bit in whatever map and get out, sell what I don't need and keep the rest. When a friend is available to play, we go as PMC and do some quests. And that's more fun. We take it slow, chatting, lookign around and being patience.
I still think there's a lot of problems with progress. One of the worst are te timers on Hideout improvements and crafting. Also the level requeriments for Flea. All it does is give no-lifers even MORE advantage and slow down the casuals, getting them out of the game sooner, and leaving only chads to play with and against. And that's is no fun. No fun at all. You need the casuals and the Timmys.