Mostly just repeated observations of my peers. It's kind of hard to articulate an exact experience other than general rudeness and sneering but I'll give it a shot.

Recently, a colleague of mine was presenting their work. Another colleague with CSPD (comp. sci. personality disorder) interrupted the presentation to say "this all seems very obvious." The remark was self-aggrandizing and completely dismissive of my colleague's hard work.

Witnessing this made me realize just how toxic our community can be to one another.