First of all, I totally agree with you: I don't think rejection justifies hatred. However, one thing that is different from you as a woman (and from your avatar, an attractive one) is that you likely get hit on or complements or something as validation from the opposite sex to offset that rejection. Most men don't get compliments or any validation to that effect unless they are extra ordinarily attractive. I'm not saying that you should pity most men, I just don't think your life experience is the same, even with the rejection you've endured.