Hmmm, I think there’s some confirmation bias at work here: namely, in your overlooking that that happens all the time the other way around too. Namely, discussion of women’s problems (on these boards, for example) gets shifted to focus on men.
So, nah, I don’t really think that “the internet” is particularly predisposed to just ignore men’s problems or treat them as secondary to women’s problems. There has always been and continues to be a lot of interest in discussing the problems of men.