Scientists show how ‘doing your own research’ leads to believing conspiracies — This effect arises because of the quality of information churned out by Google’s search engine::Researchers found that people searching misinformation online risk falling into “data voids” that increase belief in conspiracies.
It’s a complex answer, I think.
Yes, some curricula has definitely improved. And yes, there has been a concerted influence by disingenuous agents. And there has been a departure of skilled educators due to pay and treatment, allowing significantly less skilled, able or genuine teachers to enter the field.
So, while you could say “X is better”, that can mean very little if there is no one to teach it (willingly). So, to answer your first question: yes.