I think you're oversimplifying what is a massive systemic issue into two points that, while true, might not contribute as large of an impact as you're assuming.

Also, just in defence of female teachers, I don't think it matters so much that they're women, but that they understand that boys will be boys. Anti-male teachers were, at least in the experience of myself and a friend who went to a different school (we discussed this once), definitely present but firmly in the minority.