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It sounds to me that you are burned out/living on thin energy/emotional margins, you don't know enough people, and you are following idea groupthink so you don't really believe in what you come up with.

I think that all of these problems will be solved by working a good full-time job for a couple years while writing an interesting blog and promoting it. You'll recover your energy and confidence. You'll be working through your thoughts, finding your voice and grappling with ideas every time you write. You'll be connected to people who share your interests, and who will give you strong feedback on/insight into your ways of doing things without your having to build a whole company first. And eventually, you'll intersect a great idea with the right person/people and be ready mentally and physically, and things will seem much different than they were in your last go-around. Hope this helps.