I think kicking and deporting people from the party if they are objectively not playing up to the requirement to pass the duty, or if their performance doesn't meet the ascribed reason for the party forming in the first place (e.g., parsing or farm parties) - Then this is OK, I don't think it is inherently toxic to do so.

"You did xxxx dps I want uyyyy dps"

"You did xxx dps, but my values are ( insert ridiculous figure ) so you didnt do enough"

And,....the oldie but a gooidie

" You won the roll but I dont think you did enough dps so Im giving iut to this person ( insert name of buddy or friend or girlfriend"

DPS meters have what I call a cascade effect, you do xx dps they say they want y dps..you do that and they want more..and more and more until it becomes a sick joke. People become fixated on "performance metrics" and "throughput" and key performance" and "acceptable dps vs arbitrary figure they pull out of their rear"

Thats not a game

Thats a job.

No.