You seem to treat men as a solidary group while it is not. It's absolutely regular for a man to be treated as a second class citizen, by men. We are not "represented" in the halls of power, what an absurd idea.
A man can be disadvantaged. And there are some areas of life where, as you say, men are put at a disadvantage due to the actions of other men. This is not because "Men are second class citizens", it is a systemic issue of gendered preference that disadvantages men and women but has traditionally been a system set up to benefit men.
There are injustices in the world that are unique to men, and deserving of correction and justice. That is not in question. What is in question is looking at the state of the world and saying "You know who really has it tough? Men."
For the rest of the argument I understand it, but don’t agree, for two reasons. First is that there’s enough man-only targeted demands and judgements, all well known. Second reason is that the world has supercharged the terms “man”, “manly”, etc so much, that discriminatory statements with these may sound absolutely natural to some.
There’s absolutely a majority of cases of people who get all the downsides but can’t entertain the upsides of “being a man”, for not behaving “like a man”, despite being one (as in, being born this way and not having a strong dispreference to this biological fact alone).
Men have it though and that makes them men who have it easy — I’m curious if you see a problem in this statement.