Fine, replace my game of tic-tac-toe example with anything else you said, and assume a high school gym coach is randomly assigning people to the teams. Everyone in the Feast knows how the system is setup, but some people insist on giving death threats to the kid with a bike helmet and coke goggles instead of accepting that this is just the way the world works. You win some and you lose some, you move up in the tiers and see less of those noobs, and at the end of the season the people most capable of picking up their teams slack while doing their own job (and maybe a little RNG luck with matchmaking) gets a prize.
As you touched on imperfect comparisons, teams members DO get replaced every single match in solo Q. Solo Q Feast IS NOT a team based event. Every single person on your own team is still an enemy in the big picture. I think this makes it much easier to justify losing your marbles on someone, hoping to berate them into never Q-ing again, only to find oneself in the exact same situation next match with a different person, until so many people have been pushed out of PvP that these individuals now find they themselves are the lowest denominator, and they start lashing at their betters because they can't cope with the reality that they lost a match, because their team deserved to lose.
It would be ideal if every person in the rated matches was there because they'd had sufficient time to study how their job works in PvP, the best times to burst, CC and retreat, and they were genuinely practiced and ready for competitive PvP. But that's not reality. Non-rated matches are dead queues, and SE hasn't done a pre-season since season 1. So ofc there's going to be a lot of people getting their feet wet for the first time in the rated season. This is the pre-season training grounds for people wanting to get into PvP for season 4.
Edit: All I wanted to do was defend Tic-Tac-Toe because I don't see solo Q as a team effort even though we work with other people for a common goal in 8 minutes bursts. There is no team mentality in it. Guess I got long winded on it
Pete Rose isn't being excluded from the Baseball Hall of Fame for being bad at baseball (gambling). Charlie Sheen didn't get dropped from Two and a Half Men for being a bad actor (drugs and trash talking the producer). Bill Clinton didn't get impeached over bad foreign policies or spending, it wasn't even for his affair. It was becaue he lied about it. People can be great at their jobs and their hobbies, but thin morale fiber is a bigger problem for the community than thin skin IMO.