They know why readers complain. They wish you understood their perspective better.

A significant problem is that content costs a certain amount of money to be produced, and web content is unable to command those prices.

Ad fraud is a big part of it, and some of the companies in the best position to solve it (like Google) are benefitting so handsomely from ad fraud that I can't imagine them stopping it.

Ad blockers will hurt legitimate content producers, but because people defrauding advertisers don't use ad blockers, they'll continue to make money.