I lived in and near a city of a million people, but getting access to "alternative" music was difficult. My teenage daughter can find anything she wants on her phone.
Radical politics was fringe and out there. I scoured the local used bookstore for anything I could find that. Easy to find whatever you want now.
Publishing music or poetry or your opinions in general was a major endeavour. "Zine" culture was vibrant but marginal. Now you can easily publish whatever you want. (Doesn't mean you'll find an audience though.)
As for AMC or whatever. I'll repeat what others have said: why are you looking there? Why would you expect to find diversity there? Or in print journalism? Or in music charts? These are artifacts of the past. I can hear my 14 year old through the wall cleaning her bedroom while listening to Baby Metal. She didn't get that from a chart. Or from me. Stop looking for the "abnormal" in "normal" places.
That said, going to see Bob's Burgers in the movie theatre tonight with the family. It's not radical or subversive, to be sure, but something like that would never have made it to the screen in the 80s.
Now, if your definition of "counterculture" is a) being an anti-social jerk and b) getting attention and getting paid for it on someone else's platform. Yeah, you might have a hard time now.
Apart from the cultural rupture of the late 60s and early 70s, much of the entire second half of the 20th century was a wave of pretty aggressive mass media mass market conformity, so much so that our reaction as youths was similarily aggressive. Where do you think the anger in punk came from? Because everything kind of sucked.
If there's a problem with "counterculture" today it's that it'd be very hard to pick one single culture to counter.