It is true. Feeling unworthy and beating yourself over your flaws or mistakes can bring in a lot of negativity and bad energy. Insecurity comes from a lot of reasons or hang ups. It can start in your childhood as well, because of bad experiences or your own family.

I'd rather say that some signs are more prone to feeling negative about themselves than other.

I'm very happy to hear about your experience. I'd rather avoid that chatroom - quite frankly, it seems like a horrible place. Don't trust people with this outside of our community. It can only end badly.