God, yes, this. Although you can see Azula breaking down in the "Boiling Rock" episode, too, and I still hold more tightly to the theory that it was losing Mai and Ty Lee that drove her over the edge more than anything else, it doesn't change the fact that her mental breakdown coincided with her rise to power in an explicitly misogynistic way, however accidental that was.

I have heard the creators of ATLA recently have said they held off on revealing what happened to Ursa because they were "waiting for the right story to tell it in" (not that this excuses much: I also recall RDM and co. saying the same thing about including gay characters in BSG, and then the following season including two explicitly gay characters just to say they were both psychotic, unfit for command, and needed to die for the sake of everyone else's survival), and that there's been some buzz they may be doing an animated movie or two to follow on from the series. It's my fervent hope, if this happens, that a major part of that story also involve Azula's rehabilitation and/or recovery, because ending her story like that is majorly unsatisfying and frustrating.