DontMind, I am one of those parents … and you can look at threads discussing education, there are a lot of people of all ages with different opinions. Girls (or their parents) are indeed less realistic. My theory is that for a potential learning couple – a boy needs to show years of work, while a girl needs to develop interest in finding a learning boy, which is way easier (in a short term). So, an obvious disconnect, more girls can achieve that stage when taught that way at school.
Not trying to give an advice beyond most generic. Maybe, you need to show your abilities in some other way – in chesed, working prospects .. go join an organization that works with unobservant yidden or sich kids; find an exciting job; brush up on your math & English skills, even if you are behind, you probably have enough skills. You need to define yourself in a positive way, not just in your relationship to what you are not. This may take time.