I don’t know her personal struggles, but I think part of growing up is feeling like that. That’s why so much of the music kids listen to has that theme regardless of genre. Pop, punk, country, metal, rap - it’s all “no one understands me”. Then I think you meet other likeminded people and you grow out of it as you realize the whole world is filled with individuals and they all have their own stuff going on. You’re not a special snowflake when you realize everyone is, and then you kinda become an adult who lives in society.