Time to be honest with yourself. What do you know that you don't do well, do badly, or can't even do at all?
You can carry on the way you have been until now, getting stuck on your own failings, inadequacies and weaknesses, or you can choose to focus on the things you know you do well and either let go of or give away so many of the areas that are clearly not your strengths.
In your own journey there are so many things that you do with ease, with brilliance and with total energy and sometimes even with sophistication. But you have to draw the line somewhere and acknowledge that there are some things where you hold yourself back, derail yourself at crucial moments or even sabotage what could otherwise have been an enjoyable event or experience by choosing to think you can do better or know better.
Consider the possibility that you could simply stop doing some of the "stuff" that others could do better and in less time. Let go of the desire to think you have to be right all of the time or even most of the time, and allow yourself instead to be involved with the things and activities where you can make a valid and a useful contribution.
For me it was letting go of trying to be in morning meetings and recognizing that my body clock just could not do it. The freedom and exhilaration I experienced when I stopped booking morning appointments was great, not just because it took the pressure off me, but because it also allowed me to stop disappointing clients by turning up late or not even turning up at all!
For a colleague who lives locally, it was letting someone else deal with their post and email management, giving up the struggle with believing adamantly that he had to do it all himself.
For a neighbour with a retail store it was the issue of constantly comparing herself against another similar business in the next town, and wasting time unproductively in worrying about whether her own customers might go over to the other business. Instead she developed a focus on what was great about her own offerings and why clients should spend their time, energy and money in her business. The happier she was in her work environment the more obvious this was to her clients and they did more business with her.
What is it that you are trying to do, and what can you let go of?