This is probably a topic likely done to death on other forums (and probably here as well), but I'll start a discussion on this anyway since I saw something interesting:
So David Szymanski (developer of DUSK and Iron Lung) has posted some thoughts claiming that FPS multiplayer games peaked around the early 2000s, implying that a focus on Esports, rankings, and limiting interactions between different players (like through matchmaking) has made multiplayer games less fun. But even though David seemed to explicitly mention multiplayer FPS, I think this could also apply to other multiplayer games as well.
So here's how I see it: a focus on competitiveness most certainly is a great way to cultivate a toxic environment, e.g Overwatch, League of Legends, Fortnite (guess you can say battle royale in general). That, and the vast amounts of money that gets involved in eSports means that some devs can get enticed by their own greed thinking they can tap into that market, to the detriment of making an actually fun or unique game (Off the top of my head, Lawbreakers marketed itself as a hypercompetitive sweatfest and flopped, and DOA6's attempt at getting into eSports was a major factor in its failure).
These are my thoughts, a bit jumbled up as they are, and it's mostly because I don't play online multiplayer games so everything's based on my observations.
I'm interested in your thoughts though. Do you agree with David Szymanski's assessment or not? And why?