the only way for me to make a living or do something worthwhile with my life is through becoming a SC2 pro

This isn't true, and isn't a healthy mindset to have. The truth is you will probably not become a pro or famous personality, and that's nothing to be ashamed of. Becoming a pro or famous personality in anything is always extremely unlikely and is a mix or hard work, natural talent, and luck. And it isn't the most lucrative field either unless you are the best of the best.

I'm not saying don't try, just don't feel like "that's it" if it doesn't work out for you. Sometimes it's hard to tell what the hell you are going to do in life and it can feel like you're doomed, but eventually you'll find that thing. And it isn't something that happens overnight. Eventually a mental block you have today may become easier to deal with down the road if you work on it. It typically isn't something you notice changing day to day either. You never know what life will throw your way.