I think the “I need to be winning” mindset isn’t discouraged by PvE at all, tbh.
There are toxic reasons why some players prefer PvP, but I also think there are toxic reasons why some players prefer PvE. Like, is it because they want to collaborate with other players? Or is it because their persistently obnoxious behaviour tends to invite challenge, and they’d prefer an environment where they won’t be, and the person doing that is the bad guy?
The type of toxic player I see on a PvP game is someone who needs to prove they can take out other players.
The type of toxic player I see on PvE games is a self-insert power fantasy who acts like if you don’t agree with everything their character says/does, and stroke their ego, you’re being rude.
The chill type of player I see on a PvP game is someone who separates themselves from their character, intentionally wrote in flaws and exploitable secrets, and looks forward to other players using those pressure points to drive the story forward.
The chill type of player I see on a PvE game is someone who enjoys being part of an ensemble cast working together to solve the main story’s problem.
But I just don’t really buy into the idea that PvP/PvE inherently inspires a higher calibre of players.