Patriarchy theory - that men oppress women - is not a strawman. Look up patriarchy theory on wikipedia and go to the 'feminism' section. It's all there.
Of course, there are more-batshit-insane versions of it (that men's oppression of women is ineluctably tied in with capitalism, etc) but it doesn't need extra adornments to be called out as false.
Some versions if patriarchy theory say essentially what I says above. There maybe other versions that are nearly as batshit crazy as your posts, but I've yet to meet anyone advocating for them.
So, which part of my description above do your disagree with? Which party do you consider batshit crazy?
What you describe here:
I accept, based on solid evidence, that women and men around the world tend to receive different reactions to the same actions, in ways that sometimes harm men more, and sometimes women, and always reduce either's freedom of choice. I believe that many, though not all, of those differences in people's reactions can be summarised as stemming from viewing women as weak, passive, caring, worthy of protection, and men as strong, active, aggressive, self-sufficient. This is true both for differences that harm men - e.g. receiving harsher sentences for the very same crimes, and for differences harming women - e.g. being overlooked for management positions, though some (many?) differences may not be straightforwardly reduced to this dichotomy. I believe that the world would be a better place for men and women if all people received the treatment they deserve based an what they do, not on who they are.
Is not feminist patriarchy theory. Feminist patriarchy theory, from wikipedia (first paragraph)
Feminist theorists have written extensively about patriarchy either as a primary cause of women's oppression, or as part of an interactive system. Shulamith Firestone, a radical-libertarian feminist, defines patriarchy as a system of oppression of women. Firestone believes that patriarchy is caused by the biological inequalities between women and men, e.g. that women bear children, while men do not. Firestone writes that patriarchal ideologies support the oppression of women and gives as an example the joy of giving birth, which she labels a patriarchal myth. For Firestone, women must gain control over reproduction in order to be free from oppression.[24] Feminist historian Gerda Lerner believes that male control over women's sexuality and reproductive functions is a fundamental cause and result of patriarchy.[28] Alison Jaggar also understands patriarchy as the primary cause of women's oppression. The system of patriarchy accomplishes this by alienating women from their bodies.