If you are expecting every HB8 or HB9 to have immediate high interest, even if you yourself are on that level you're not living in the real world.
All this "she flaked once so I'm never going to speak to her again" is bravado and your ego talking. A guy with legit confidence who understands the game won't care. I've banged girls who flaked on me a month before. Circumstances change. There are so many reasons for why she flaked that could have NOTHING to do with you.
If a chick flakes on you, you shrug your shoulders and move on to the next one. Then you try again a week later, and make sure that your flake is now the insurance (or the insurance for your insurance if you're being ambitious!)
Here's my schedule for next week. All names have been changed.
Monday: Italiana (main), Sarah (insurance), ex gf (insurance), Julie (insurance)
Tuesday: Jamie (main), Leah (insurance), Angela (insurance)
Wednesday: [Salsa so don't really care if they don't turn up - essentially my hobby here is the main chick] Celia (insurance and a flaker), ex gf (insurance)
Thursday: [Salsa again] Charlotte (insurance)
Friday: Diane (main), Francis (insurance and a flaker)
Saturday: Rest day
Sunday: Tyra (main)
If you get a few flakes out of this you'd almost be relieved. Stack them. Before you know it you'll have multiple women posting on dating websites complaining about the guy who flaked on them rather than the other way round. Game is the game.