Part of the issue is that you can't look for the counterculture in the places you expect to find it. If you do, you're probably just looking at a different corner of the same culture.
The other part of the issue is that even if you happen upon a counterculture, you may not like what you find.
For something to be truly countercultural, it couldn't just stand for the things we already agree with, it would have to genuinely shock or offend us. Because we are the culture, a counterculture would by definition be outside our context, and we would just dismiss it as ridiculous, rather than a movement.
We would probably not share it virally, or like it on Instagram. Thus, you won't find actual countercultures on popular forums. If you do, they've probably already been banned.
I think when we imagine a counterculture, we're actually imagining an edgier but still palatable version of the culture we're in. We think back to the countercultural movements of the 1960s-200s which have become simply the culture itself, and we think "Well, I agree with those movements, so I must be pretty countercultural". But no, that's just your culture. A counterculture is the thing that disagrees with you. An actual counterculture would read to us as ridiculous, dangerous, or even evil.