The problem isn't necessarily corporate services - the problem is corporate services with no practical competition. If there's an actual marketplace, then enshittification is limited, because you can just hop providers when service degrades. If there's an actual marketplace, then you can hop providers when some government takes control your provider.

Putting fun services behind the wall of 'you must be this technically competent to participate' isn't going to fix the broken system.

I agree in principle. I know how to self-host, and I do self-host some things, but I can't always afford the upfront investment (especially with today's hardware costs) and I don't always have time to keep up with the administration (because I'm a wage slave) so I end up renting some of it. I'm not the only one in this position.

I think there's a place for rented tech services just as there's a place for rented housing, but the problem in both cases is regulatory capture by landlords that mean we get stuck renting forever from exploiters. (And with tech there's the surveillance too, so they're the landlord that puts a secret camera in your bedroom.) So anyway, I'm trying to at least pick my tech landlords more carefully until I can afford a better solution, and as far as possible I try to make sure my stuff is encrypted before they see it.