FreshRSS has been amazing, as you said, other readers have other goals in mind and seems RSS is just an add-on.

On Android’s also there are no good clients, I’ve been using the PWA which is good enough.
There are several extensions for mobile menu improvements, I have Smart Mobile Menu, Mobile Scroll Menu and Touch Control (it works great on Firefox, but not on brave, it’s too sensitive there, so YMMV).

There’s also ReadingTime, but there are feeds which don’t send the whole body of the post, so you might only see a 1minute read because of that.

The extension AutoTTL processes the feeds and makes them update only when it’s more likely for them to get new items instead of every X minutes configured by FreshRSS.
Still there’s a problem when the MaxTTL happens, all feeds are allowed to be updated and you might hit some rate limits, so I developed a rate limiter. Still there’s a problem with AutoTTL because how extensions are loaded and with the http code reported by FreshRSS.

I found this project which receive the emails of newsletters and turns them into a RSS feed, I’ve only used it for one feed and I’ve only received one entry, not sure if the newsletter is that bad or if the site struggles to receive/show them. Haven’t tried something it.
https://github.com/leafac/kill-the-newsletter

There’s also this repo linking a lot of sites with feeds, and some sites which don’t offer feeds directly are provided via feedburner (which seems it’s a Google service and wikipedia says "primarily for monetizing RSS feeds, primarily by inserting targeted advertisements into them", so use those at your own discretion) https://github.com/plenaryapp/awesome-rss-feeds

I thought this too, I hated docker because it was supposed to be the solution of “works on my machine” and the only thing that did for me was force me to learn more configurations besides the configuration of the service you wanted to install.
And as you said, plus the hassle of having to run some Linux distro.
But little by little I had to get deeper into docker and Linux, mainly because of my work, and now I can easily deploy any service in the VPS I have or test it with WSL. I even started dockerizing some of my own flows like building and deploying my own projects with docker.

Believe me, it’s worth all the time to learn docker and linux.
Start small, few lines or keywords each day, you won’t have everything you want to deploy in a day or two if you don’t already know all the technologies.
And remember, if you don’t easily find something you can always come to ask in a post and we can try to help you!