I think you underestimate these companies. They are global and they profit off of the people using them. They are masters of their craft and pay top dollar to maintain that edge, they won't fall because of how big they are, only because people decide to stop feeding the machine. Facebook, the company, is not just facebook.com now, it's a lot of things and the company is primarily an analytical company.I love technology and am trying to get a job in the field, but I feel it has gone too far. Kinda miss when phones were not listening and Alexa did not exist. Of course, I also miss when the internet was sort of still a foreign land as well.
I see a reverse happening at some point. I think people will get tired of technology after the Zoom year, and I think a stream of things will take place to get us back to a 2010s point in tech. We will probably have a downsizing of Home technology and a return of physical media in some form. As for the internet, I just feel a social media purge is bound to happen. It is clear that most of these sites were incapable of taking on everyone, and I think just a push or two could make them collapse.
I personally think FaceBook will be one of the first to go, outside of Tik Tok. FaceBook has a very old base now, if the Boomers go, then so does half their audience. Tik Tok will likely die out in a similar vein to Vine or Tumblr. Either there will be a replacement or the user base will get so bad no one uses it, something that is getting more present. The real question will be wether Twitter starts to die down or not. I think it and YouTube are safe, but I can see some downsizing in overall usage and appeal.
All of these convenience items have to acquire a negative perception (not cool) to go away, but companies do a very good job of making them cool to have. In the tech world you find the people who hate IoT and avoid it at all costs and the people who try to be bleeding edge so have an entire "smart home" where it's all inter-connected. So even people who you would think know better are deep into that ecosystem sometimes and they've usually just decided being deprived of those conveniences is too tiresome.
Imo we're never going back to 2010s, the internet is going to evolve very differently this decade and I imagine a lot of "fringe" people are going to go further into the corners of the web and federated services will kick off among that crowd because it's very hard to take down.
On that note, I also imagine govts and companies will work very hard to infiltrate and dominate whatever spaces people move to to try to avoid govts and companies.