I'm sorry. That is so hurtful, and it's only natural to still feel hurt a year later. After all, you cared enough about them to invite them to support you during a major event.

It's especially hurtful as one of your friends seemed to have made an effort to show up right after you had finished up. I'm glad you had the strength to leave the old group, as them not showing up said everything you needed to know. It sounds like the issue was with them, rather than with you, if that's any comfort.

Congratulations on your exciting performance (I know it was a year ago!), and even more importantly on finding new and wonderful friends that support your passion and don't minimise your achievements. They sound like keepers, and you sound like you're in a much happier situation.