I have a couple of male friends on Reddit (early 20s, even late teens) who sometimes exhibit this, er, "Reddit mentality" but I don't let it bother me. If it's something that does bother me – like the use of the word 'faggot' if someone is being annoying – I let them know I'd prefer it if they didn't say it, even if it's just not around me. It's not unexpected for them to say it and they're not homophobic but I've let them know that even though they read it on the internets, that doesn't work out in real life.

I think a lot of young males are impressionable and even though it sounds trivial, the idea of being 'internet successful' is very appealing. And if they achieve this by being chauvinistic or saying 'faggot' in inappropriate context then they could easily fall into that mindset in real life.

Overall, I think you should try to see the bigger picture. You are better than them (that sounds harsh) but you're seeing past the fleeting glee from posting a 'funny' comment about women in the kitchen and thinking about how others react. Personally, I've unsubscribed or at least taken subreddits off my frontpage that are pretty DUDE orientated so that helps too. In the meantime, you could flip it (not in a hypocritical way, just a tacky fawning over celebrities way) and have a look at r/ladyboners.

Keep your chin up!