I could be very wrong but the reasons you gave were all scenarios where you end up successful. That probably makes me think that you are just scared of the fail

I could be very wrong but the reasons you gave were all scenarios where you end up successful. That probably makes me think that you are just scared of the failure and judgement that comes from putting yourself out there. For me the solution has been to know that whatever I create is out of the need that it has to be created or it will bother me to no end. So even if it is criticised the other option would have been to not create it which would be much worse. Also if you are not on point when it comes to your diet and exercise there is a lot of room left for you to feel better than you are at the moment just by doing that. The difference can be night and day.