That’s not my experience, and I’m an elder millennial. The only time tiering up has encouraged me to quit a game was when the higher ranked players were just more toxic. Being challenged can be part of the fun.
That’s not to say I think matchmaking is simply better than persistent servers. Having a group of regulars and developing a bit of a server culture is good fun. I guess I like both options depending on the mood.
Has there ever been a repeat mass shooter? Is the risk of recidivism really the right theory for understanding the incarceration of mass shooters? Even if we broaden the question to whether juvenile mass shooters are likely to commit other crimes, is that even true?