@Balladalidila I mostly main Wraith, while using Lifeline in Ranked, because let's face it: Most teammates are as useful as a P2020 with no ammo.
However, this is something I dislike as well. I've also seen Octanes, Bloodhounds, Bangalores, and Revenants run off as well, while it's not common, it still happens. It's mostly the Octanes that are second in the whole "running off into Narnia".
The problem is, the game is too busy catering to these kinds of people, same with toxic people and other kinds of players that negatively impacts gameplay. The only way to really solve it, is to put all these players onto the same team, so everyone else don't have to deal with them being on their team. Like, it be so much easier having to deal with a random Wraith that ran off, then being that Wraith's teammates against the team.
But, again, it's not like it's going to be fixed because the game works in their favor. Not to mention that you make it sound like the Wraiths are "pro" players. Most "pro" players are taking part in the ALGS Autumn Circuit as well. That being said, why would they ever want to "ruin" this random Wraith's "gameplay", when getting all the players in a line could hurt their ALGS events?
In other words, people thinking they can 1vs the server is pretty much the purpose of the ALGS tourney. Except, they're given a team and a cash prize goal. I'm just trying to say, there's a lot of players who think only about themselves. Hard to make them not be selfish.