n.b. I haven't tested importing 600+ feeds!
I mainly browse on my laptop, but it's pretty decent on mobile.
I felt exactly the way you did for a long time. Eventually, I decided to invest in setting up a more healthy and symmetric relationship with information, like you describe.
I realized RSS was the right tool for this goal. I'd definitely recommend trying this, even if you don't have the gall to self-host. It feels like I get three square meals a day, instead of injecting corn syrup every 15 minutes for 16 hours.
I chose to self-host my reader + data store, so that all of the data can live on my machine, and so I'm not dependent on some VC, advertising, or goodwill-backed project that will kick the can in a few years. There are plenty of good options. I decided to try out miniflux [1] as a first pass because I liked it's dependency graph, and haven't felt the need to try anything else.
Most blogging platforms (blogger, squarespace, wordpress, substack) produce RSS feeds by default. News aggregators like HN and Reddit have robust APIs for generating RSS feeds.
There are products like you describe, that convert a web page into an RSS feed with various hacks. IMO, this creates too big of a dependency on a flaky third-party. It might (literally!) be easier to build+maintain it yourself for the few sites that don't have an RSS feed, with `curl` `echo` and `sed`.