It's because we're incels OP. You know, involuntarily celibate. That is to say the thing that is stopping us from being in relationships with women is that women DON'T WANT to be in relationships with us.
But if you're really a low-iq haver and can't understand "why", let me break it down for you in two simple to digest points:
1. Physically repulsive—physical deformities, asymmetry, disharmonious features, medical conditions, etc or any combination thereof; and
2. Mental/neurological abnormalities—aspergers syndrome, schizophrenia, schizoid, low/high iq, etc and any combination thereof.
Not rocket science.