Those qualities are what's needed to build something out of nothing. It has never been easy. If you don't think females can do it, well
that sounds sexist to me.
Nobody has a magic wand they can wave to give startup success to timid, easily defeated people. If it is your nature to make excuses, I suggest you go get a government job. No amount of feminist cultural revolution is going to convince VCs to throw away their money in order to be politically correct.