The 'dating market' is pretty much screwed up. It goes along traditional values -- power, beauty, youth.
For long, I felt that the main 'players' there were the ones who knew how to play, rather than have anything intrinsically good in them. Though I was confident of my own worth, they would always judge me poorly because I didn't care much for the values above.
The best way out is to just have scorn for the dating market, prove yourself in other ways (work, doing something socially useful, being kind to people, being a great friend) and show them what you're worth. One day they'll realise.
I would never come to terms with that. I'd work on myself until I wasn't low value anymore. But you can either choose to accept your circumstances or change them. No one is destined to be at the bottom of the food chain. Some may have to work at it harder than others, but everyone is capable of being on top.
You don't. If you accept that you aren't of high value in the dating field, then guys will pick up on your lack of confidence and they'll be turned off by it. So do what you need to do to convince yourself that you are a prize. Take care of yourself, start eating right, go running a few times a week, go buy new clothes that fit your body type, buy subtle makeup that matches your skin tone. I don't mean to suggest that your appearance is the reason for your lack of success with guys. But if that is what you are insecure about, then working to fix it will help you feel better about yourself.