This weekend was just insane

I spent the majority of the weekend dropping in solo with squad fill to help randoms out and get some passive missions done. I shit you not, I played maybe three games all weekend where my team didn't just abandon me, even though I stayed with them. And I don't mean they got in a vehicle and left me in the dust (though that did also happen more often than not), I mean they left and joined another squad and either killed or hunted me afterwards.

These weren't premades that I was unlucky enough to run into either, I heard these guys negotiate over comms each time and either join a 4 man that didn't have room (so they immediately turned on me) or they used knowledge of my position as a bartering chip to let the other team join them. Hell, one time I had the gear to make a med vest and a stealth vest and was on my way to the buy station to get my teammates geared up, and they knew it, but they got attacked and told the enemy team they knew where someone was (with all that stuff) to join up and hunt me. I even heard one in prox chat (after assimilation) go, "Oh, you guys are a four man? Let's go be a dick to our old teammate."

Like, what the hell? Is everyone just a coward piece of shit now with no team loyalty? Every LFG post is just trying to get premade 6 man gank squads going, every matchmade team is just chomping at the bit to form platoons and hunt other players, so I guess I should just go fuck myself unless my squad is on?