I haven't seen season three of Crazy-Ex Girlfriend but my feelings kind of mirror @David T. Cole's. I love the show, the characters and the musical moments - not just like but genuinely love - but kinda felt the show wanted to have its cake and eat it too in the way character turns would happen so quickly.
As someone who has suffered intermittently throughout life with very serious depression, it always felt like Rebecca's depression was presented as relatively consequence-less, or that the stakes were too low. I couldn't really put it into words until I started writing about it just now. I realized that I'm ok with Rebecca not taking her depression seriously since denial is a big part of the disease, but I have a hugeissue with the fact that the show didn't take her depression seriously, or at least didn't seem like it was up until the last episode of season 2.
I may give it a re-think once s3 comes to Netflix and I get a chance to watch it. That said, I love the show, and as such am willing to forgive such things or chalk them up to it being such a wildly different concept and execution that it took them a while to get their sea legs.
tl;dr still better than Cop Rock (@Sarah D. Bunting knows what I mean :D )