I have bipolar II too. It took 17 years and 3 different psychiatrists but now I feel great. Yes, 17 years! Having bipolar, you should never, ever not be on medication. The way I see it, bipolar is two separate illnesses, the mania/hypermania and the depression. I have been on Lithium for 17 years which eradicates all hypermania for me (excitability, feeling of being out of control), the depression was much, much harder to address. I tried every antidepressant on the market to no avail.
You need a psychiatrist who will persist in trying combinations of medication. In the end I believe I just hadn't been given the right antidepressant for me, and most importantly, an adequate dose, For me I realised I required quite a high does to address the depression.
Personally I found CBT useless for me but you may be different. All the anger and self loathing disappeared once I found the right antidepressant at a sufficient dose. I feel like a new person now. A lot of problems I put down to psychological/ personality were eradicated once the depression was in check, so they were just the illness/biological.
The only downside is that the antidepressant depletes my sex drive and I can't ejaculate. This can be devastating for a young gay man, or any man for that matter. If I want to have sex I stop taking the antidepressant for 3- 4 days and the sex drive and ability to ejaculate returns, usually with a vengeance, which is good. I'd rather feel happy and stable than be able to come every day, it's a small price to pay and if you really are that ill you will understand.
I had ECT for the depression which only erased my memory (short term, it came back) and although today it is given under an anaesthetic I still find it barbaric. Some people find it works for them but I've never heard of anyone who's had ECT who didn't relapse very quickly.
I also had TMS which is a fairly new treatment in which a painless magnet is placed on one side of your head for 40 minutes once a day for 20-30 treatments. For me it was remarkable how well it worked for the depression and my doctor believes it opened a porthole for my brain to function properly again and the antidepressant keeps that portal open, if that makes sense?
So, in conclusion I would suggest finding the right psychiatrist (and really it has to be a psychiatrist, you can't do this with a G,.P. they just don't know enough about it) persisting in trying different medications until you feel a change, then making sure you are on an adequate dosage, TMS worked well for me, but isn't available everywhere. Of course, this is just my experience, everyone is different. But yes, the palpable anger and self loathing, the negative thoughts have all gone. After 17 years I think I deserve a break.
Good luck with your search for health and happiness. Depression and bipolar are a true nightmare, it's agony. I wouldn't wish it on anyone.