Although I lost weight I feel miserable and angry.
Do you think there is a reason why you feel so angry?
I still need to work through some emotional issues that weight loss didn't solve.
A lot of times we think that losing weight will make everything better. But you've seen that the underlying problems may still be there. You should consider talking to a counselor about it.
No offense, but your advice is terrible.
Just try and figure out what insecurities you have may be upsetting you. Life is about improvement, and sometimes you need to pinpoint what is bothering you. Another thing to try is getting exercise and eating healthy as these two things can directly help your brain.