If you have a 90% failure rate maybe it's time to change your MO. Explain what you are looking for, and if the girl doesn't match your criteria, then move on until you find the girl you want.
Walking out on 90% of the women sounds weak, arrogant, and is a gigantic waste of time for all concerned. Are you compensating the women and saying a few kind words before you turn and run? Or are you boosting your fragile ego by rejecting these ladies and just leaving them with a hole in their schedules, devastating humiliation and a loss of income? The girls are human beings with feelings and bills to pay, not objects for your amusement and gratification.
Your weak-assed protocols cause girls to raise prices, double-book, and give TERBians and Ottawa a bad name.
Most girls invest time, energy, and money with professional photoshoots that show them at their sexy best. They are excited about the shoots and proud of the results. Obviously most of the ladies don't look like that all the time, but to hold them to that standard is cruel and juvenile in the extreme.
Maybe you should stick around and enjoy their pleasures and bring something to the table, and the bedroom. If 90% of women are disappointed with you right out of the gate, that's not a good record, and it's entirely due to poor planning and procedures, and some spineless ego gratification.