As someone not living the us but regularly reading news from both sides of your media landscape, I can tell you that it's not regulated what they can write or say or what's promoted. Your media is all over the place. There are differences in how far they go on the spectrum and some are definitely insane on what they publish to the level of leaving out all the important details about certain situations to push their agenda. How do you think that there is any regulation at all?
Also for tiktok, the algorithm needs less than an hour to almost fully understand you and it will then push a mix of what you already like and agree with, things that you don't like and absolutely disagree with but in a way that makes it look bad so in the end you also agree with that, and some funny videos to keep you entertained. This way they are maximizing the time you stay in the app to increase their revenue. It polarizes your world view further and further and without people to talk to and discuss, your ideas and beliefs will be turned into religious level thinking, radicalizing you and making it more and more difficult to accept different opinions. If you only consume what you already believe, things will go downhill very quickly. That's the reason people can't talk to each other anymore, the truth in most if not all cases is somewhere in the middle.
What we need is social media that is not algorithm driven, not optimized to keep you at the device for as long as possible but to show you a multitude of opinions to a topic from different angles, not just the one you have already chosen as your truth. We need to talk again, accept that other people can have different opinions without shouting them down. We need to try to look at things from different perspectives not just our own.
And most importantly, we need to accept that we can't have an opinion about facts. We need to listen to people that actually have professional knowledge about a topic. The guy that used to be a fitness trainer but now has a telegram channel to spread some important truths about climate change actually knows shit about how the world works. They want to make money selling you any truth that works for you.