In fairness, AA gets plenty of bad apples of their own. Possibly more. Jumpseat around sometime. Some real nasty dudes in the right seat over there, toxic like you wouldn't believe. There are some unhappy SOBs here at Envoy, but their grievances are less petty in my experience at least.
I rode behind an FO who spent 2.5 hours from 10k and up talking through gritted teeth about how he thinks some regional schmo he saw walking through the terminal with a set of Beats on his head should get fired immediately. I think he thought it was me.