It means men are being poisoned.
If you aren't someone who displays that specific bundle of traits/behaviors, I would suggest being stoic about it and not taking the term personally.
Regardless of how the statistics for that specific set of behaviors break down my personal experience is that both the application and acceptance of such terminology (ie referring to various sets of behaviors which it might make sense to group together based on whatever metric) is highly selective in a manner that's convenient for the party expressing it. The statement is often true but the grouping superfluous, included only (seemingly) to push an agenda.
> You’re not allowed to feel things. Emotions make you weak. Just suck it up and power through. Bottle it up.
The person who most embodies these traits for me, in my life, is...my mum. I don't view them as exclusively toxic any more than I view them as exclusively masculine, either. Sometimes you really do just choose to hug your kids even when they were aggravating little twits five minutes ago and you're still mad at them, and that's a good thing.
Even supposing that were true, why does it make sense to invent and use a discriminatory label for a whole group? You just assert that without justification. Is that acceptable in any other context or for any other group? Do we speak of toxic blackness, or toxic femininity, or toxic Islam?
I think it’s important to follow etiquette in common language rather then label entire minorities or groups based off of statistics.
It's a term used to apply guilt across all males to subvert any actual debate.