Well ideally misandry would never be allowed to exist even in a post patriarchal society. But it doesn’t exist now, it is hypothetical.
The ruling class is only men, it is exclusive to men, the ruling class holds disproportionate power in society. The ruling class is the principle group that benefits from power structures, like misogyny racism and homophobia. The ruling class is not disadvantaged as a class in any way, they are the apex of social economic and political power. They have supported institutions like slavery and patriarchy as means of reinforcing their power by stratifing society to benefit themselves. The ruling class has no power structure targeting men as a class.
Toxic masculinity largely functions by excusing the violence caused by men against women and minorities. It does not exist as a system that commits acts of violence and discrimination against men as a class. It has a side effect of discouraging men from being things that are deemed effeminate, like emotional intelligence and empathy. Which is absolutely a real problem that is important to talk about. It promotes men as being free from the consequences of comitting acts of violence against women and minorities. It does have side effects for men, but it exists as a means for men to hurt those other groups and not be held accountable for it. Rape culture is a significant part of toxic masculinity. And the ruling class benefits the most from this.
I’m getting tired of reiterating the same points to the same inquiries though, so please feel free to read what I’ve already said if you’re curious how I think.