The OP started with the observation that porn (hardcore) is a huge problem. Affects both genders in different ways, none of which are good or useful.
Perhaps we need to go back there.
Surely the sheer ubiquity of porn is considered to be a major problem.
If so what are we prepared to do about it?
IMO, the best first step would be to limit porn viewing (and making) to those 21 and over. Yes, I know that some will jump on me for saying 21 instead of 18 but brain science tells us that 18 is far from adult. So is 21, but it's closer to what we really expect of people in real life at 21. Using 18 as the adult age works mostly as a way to avoid responsibilities and to use harsher punishments.
Under 21, there is still too much brain development going on and people are doing a lot of figuring themselves out sexually at 21 and younger.
The real issue is how to limit it. I believe that such sites insist that they are adult only and must be 18 (or maybe 21) to enter. But all it takes is a computer (including phone) and internet access.....
Age limits don't make much difference. Plenty of porn on the internet that's not behind any sort of filter.