The truth is we have always had propaganda all around us and gossip/rumor was even bigger pre-internet. Now we are absolutely flooded and I am not advocating against fighting it, I am just advocating against blocking or expecting some ultimate source as the truth.
Critical thinking can be helped by educating and making it clear that news is like advertising today, it is mostly marketing. Like on commercials when you have the fine print or pharma meds when you have to list side effects. News should also present all sides and ones that don't should be seen as biased fully.
Most people know marketing is inflated truth or lies, the same needs to be reflected of news and media. Facts and information can help decipher if it is real or not, even if people aren't paying attention or care about facts. Even small stuff like Youtube saying a certain video is marketing, unconfirmed or from a source funded by a foreign government, that is all helpful. Same way people see content in a TV ad or in a tabloid, and know not to think it is real. Now there will always be people that believe fake things, there are still people that buy goods from the phone from telemarketers, but ultimately most people know to raise their level of critical thinking and expect a higher level of trust in those areas.
A big problem is when people automatically trust a source too much or it feeds into their confirmation bias, sometimes you can't change that but you shouldn't block all content or have a corruptible institution to manage it, because the people that can develop critical thinking stop relying on those skills and now you have a bigger problem.
The 'truth' needs to be broadcast from many sources not a single source, the oceans of information need to be mostly fact based/correct with more quantity and quality than the tabloid fake news.
"Get your facts first, then you can distort them as you please." --Mark Twain