The mass, thus the normal user, is indeed the enabler.
But this isn't the fault of users, "normal" or otherwise; enablers don't make people abuse alcohol or whatever. Alcoholics who blame their enablers are deceiving themselves, and if designers try to blame users for their design errors, they are making the same mistake.
A lot of the crapness, AFAICS, is down to mobile. Mobile browsers and desktop/laptop browsers are different, and are used differently. And mobile browsers aren't all alike. Since most website hits are now from mobiles, designers are optimising for mobile, and then their employers stop the project before the desktop/laptop work is done. This really annoys me, because I'm too blind and fat-fingered to use a mobile as much more than a phone.
I think the crapness of the modern web[1] is going to eventually result in a rebellion. Like, the crapness seems to be snowballing. I mean, popups? What? I thought we got rid of them 15 years ago, because they were crap. How come people think they're now OK?
[1] The OP spoke of "todays's internet experience", but all he spoke of was the web. The rest of the internet seems to be working as well, or better, than it was working yesterday.