She briefly dates Greg in season 1; in season 3, she starts a relationship with Hector, whom she eventually marries.
As far as I'm concerned, when a guy calls his ex crazy, it should be a red flag.
He begins dating Darryl after the latter comes out as bisexual.
Shitting on other women where men are concerned is sort of primal and instinctive to a lot of us, and it's deeply unappealing.