veterans tend to know veterans more than they know noobs. if you join alone and only SLIGHTLY know a lot of other veterans, you'd rather take your chances with them than a bunch of newbies. Also, it's just a developed prowess.
its like anything its a part of paying your dues...When you become a vet and enter games solo you ask the same thing why do you get targetted for being a vet so its a vicious circle really lol
From the looks of the game there was a pretty hefty premade in there; they were even negging. It's the worst part about rookies, but it's the reality. People enter with pre-mades, and if you're a newer player then no one will care if they evict you.