Thank. You.
It's really irritating to see such language anywhere, but especially in ostensibly progressive spaces. I'm trying to change my language (never used the r-slur, but I've used "crazy" so much that ... I try not to, really). And I see male-centric language all over the place. It's unfortunately ubiquitous where I live.
The one that never sits right with me where I live is "guys." The counter-argument is that it is no longer gendered, but after educating myself more on the nature of casual sexism, I think it's actually an example of how male is perceived as the default, the norm. I don't think anyone is deliberately trying to be sexist by using it, but claiming that "guys" is gender neutral really seems to be a male-centric perspective.
I used to have an account on raddle, and I also learned a lot from them about why ableist language is harmful. I'm working on it, but it's almost like I need a buddy to help call me out when I lapse and say something like "idiot" or "crazy." And the frustrating thing is, as someone with mental illness, I feel like I should know better.