However what I see online is a large, vocal portion of those who claim to be MRAs are more about aggressive and toxic misogyny than anything else. See Scott Adams and sibling comment for more info.
Because of this I don't associate the terms mens' rights with any productive discussion.
There are more nuanced takes on male issues I have seen, such as /r/menslib on reddit. As far as I know they also distance themselves from the term MRA.
Described in The Guardian as a "toxic technoculture on a spectrum of digital misogyny": https://www.theguardian.com/technology/2016/apr/14/the-red-p...
The term "red pill" is also common on 4chan's "politically incorrect" /pol/ board where taking the red pill is usually used to mean embracing conservative political thought and other related ideologies. https://en.wikipedia.org/wiki/Red_pill_and_blue_pill
It would be possible if there was a general perception that men were generally and historically, in the context in which one is an activist, oppressed based on their sex, such that being an activist for greater rights for men was consistent with pro-equality interest rather than anti-women interests.
However, there are very few societies on the world where that view is dominant or even a wide minority view, either internally or for external observers, so it's very hard to be a "men's rights activist" without the general perception being that one is acting out an anti-woman worldview.