I don't know the exact details of your situation, and I can't say I've ever experienced what you're going through but I think it can be boiled down to a simple

I don't know the exact details of your situation, and I can't say I've ever experienced what you're going through but I think it can be boiled down to a simple question. Are you doing what you love? I think dealing with the frustrations is different for each person. You have to try things out and find what works for you. This may be something you want to talk to a psychologist about.