“Big” is not a negative adjective. “Truck” is not (mostly) an identity or demographic group. You’d have to make up some term like maybe “murder trucks” to get close to an analogy. Would you not suppose that someone who advocated against “murder trucks” thought trucks were bad?
“Crowded” - maybe mildly negative. “Places” - not an identity or demographic.
“Toxic” - Ok. “People” - This hardly seems like an identity or demographic. Maybe if martians start talking about “toxic humans” we’d have an analogy.
And that whole last paragraph is just a straw man.
Let’s consider some real analogies.
“Poisonous Hinduism” “Virulent Femininity” “Malignant Jewishness” “Destructive Liberalism” “Pestilent Blackness” “Dangerous Queerness”
I literally just looked up synonyms for toxic and picked random identity groups. Could you imagine trying to make any of these phrases academic terms?
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.