The saltiness is much, much less than in some games (shooters, mobas) but a portion of every playerbase thinks they are the worst one even if they are not.
Extremely good point, I don't really game outside of online chess so I can't say that I have a very wide sample pool. TBH the chat I used to see when my brother was playing League blew any chess experience I've had out of the water. I'd almost use a word beyond "salty" for that