I am trying to keep my sense of humour and keep going, but it's hard. Everything I do seems to be not good enough, there is so much competition for every job and every opportunity and every flipping thing. Just got rejected from a short training course and whatever, it's ok, but my confidence is pretty low in general and that is because I'm just so chronically unsuccessful. At everything.
It would be unrealistic to have any confidence when I'm obviously so subpar and rejected all the time, but how can you develop confidence if you can't get opportunities?
It's like nothing I say or do is good enough and it makes it very hard to keep trying and not just wither on the couch where it is at least safe.
Even when I'm sort of good enough at something, at the actual skill of the thing, I'm STILL not good enough as a recent example shows. I went horse riding for the first time in years as a nice thing to do to enjoy myself and the lady teaching was like wow you ride really well, the horse is going so nicely for you. Then at the end of the ride, I can't even remember how this came up but she suddenly said oh you really don't look like you belong here. I'm still not sure what she meant but I imagine it is because I am not polished and groomed with expensive riding kit like the place we were in. Again, it doesn't really matter as I loved my hour riding regardless...but it's just another example of how I am never quite right according to others 
Does anyone else ever feel anything similar? How do you brush it off and keep going?