• Lack of father figures affect's men's educational success more than women

• Feelings of helplessness due to impossibly high standards beyond just education

• Lack of males employed by the education system mean fewer role models

• Less attention given to them by adults as boys than as girls

• Easily satisfied by pornography

• Lack of success with women causes men to give up on dating and self-care

• Need for more physical activity during childhood and adolescence which school prohibits

• Lack of freedom in the education system puts off even intelligent boys

• Declining social spaces means that men and women participate in society less

I have no proof of any of these, just anecdata