This is the silliest of silly red herrings. Sure, there's an extent to which none of us understand ourselves, no experience is truly objective, at least to humans, on and on. But that only makes it even less likely that people automatically understand other people's experiences from one, totally unevidenced Reddit experiment.
Yes, men and women are treated differently online. Just as men and women are treated differently in real life. It's extremely valuable for men to think deeply about how women might be treated differently and vice versa. Not just the ways we might be treated better, but also the ways were treated worse. I strongly advocate for this.
But the idea that men, en masse, should read an article about a single woman's experience posting about who knows what on Reddit, a woman who seems quite likely to be psychologically primed to believe that people will treat her with respect (an experience that doesn't align with any man I've ever met), especially in an online environment, like Reddit, where most people's usernames are gender-neutral, and all this to better understand the realities of how they're perceived in society, that idea is pure comedy.
If a man wrote the same thing about women, far from being treated with the instant respect we all take for granted online apparently, he would quite rightly be mocked into oblivion. In fact, speaking of the different ways men and women are treated, the mockery would likely be far harsher in tone. Including from me.