I am a wonderful person, I do not understand why I am single

i believe it's your core beliefs. politeness means nothing if you inherently believe women always have it easier, that you are owed consideration strictly on the biases you're polite, well groomed, etc.

you probably think you are more these things than you may actually be just from the fact you're doing them intentionally. but your beliefs towards women will alter how you interact even if you don't notice it. having autism probably just makes it even more difficult than normal to genuinely assess