My own problem with services like this is that I don't want to tell their owners what blogs I read. It's a privacy concern.
I'd feel much more comfortable using a standalone tool that I could run on my own laptop (ideally one that didn't require running a web server or even a web browser).
To practice SwiftUI, I was building an rss/feed reader but immediately realized anything you're going to display needs to be web-rendered. Or rather, to avoid a web browser (like WKWebView) the product is so neutered that it's not all that compelling.
Even stripping everything out but plaintext with an HTML parser to put it in a text view, I realized I could wrap the links with native Cocoa labels that act as hyperlinks. And then do the same with images. Hmm, what about tables and stuff? Soon I realized, why would I even want this? It's annoying to visit the origin site when the RSS reader can just render it, and it kinda defeats the purpose.
It's a feature-rich RSS reader that runs completely in the terminal, presenting text-only views of each RSS feed.
The links open in the browser of your choice (which for me is a text-only version of emacs-w3m, which I also run exclusively in the terminal).
However, some RSS items can be read in their entirety within the RSS reader[3], and does not require the opening of any links. This is my preferred method of consuming RSS.
[1] - https://newsboat.org/
[2] - https://github.com/newsboat/newsboat
[3] - ie. those RSS items for which the author has chosen to make their entire article/post available over RSS instead of merely posting a teaser and requiring browsing to their website to read the rest