I agree -- it can be very frustrating
I think it's fairly common for BP people to go through lots of med changes. I think it's mostly because this disease manifests itself in different ways in people. It's just so hard to find the right cocktail, especially when certain meds poop out on you after some time.
As far as depression goes, what about trying Latuda? It worked well for me and my insurance dropped the price down to $30 a month. I'm not taking it anymore, though. Made me too drowsy... but not everyone gets that effect