identity crisis

a feeling of unhappiness and confusion caused by not being sure about what type of person you really are or what the true purpose of your life is

A period of uncertainty and confusion in which a person's sense of identity becomes insecure, typically due to a change in their expected aims or role in society.

personal psychosocial conflict especially in adolescence that involves confusion about one's social role and often a sense of loss of continuity to one's personality

‘I'm just a person with an identity crisis, filled with self loathing and confusion.’