It seemed to me more like "Poorly raised from birth" Which makes sense if her father took a more active role in raising her then he did with Zuko (Maybe after seeing how Wimpy Zuko was.)

I mean what did you expect? Azula being a happy nice little girl until she turned a certain age then suddenly turning mean? No she was raised from probably the day she spoke her first word by her evil father who probably did not do anything to discourage any bad behavior.

Also she's had fourteen years of bad influences in her life and she's also suffering from mental problems, she's not going to be cured in a day especially since she does not think she has a problem.

Might I recommend you wait for the Trilogy to be completed before you judge it?

sure thing!