I've spent a long time looking for a perfect (for me) RSS reader, and I have yet to find one. But I am extremely grateful for the muffle/mute system in @Iconfactory's #TapestryApp. Being able to essentially set up my own content warnings for news articles (with regex!) is something that I don't think I could give up.
@heygarrett did you try https://www.currentreader.app/? It’s a new one and looks promising
Current - A River of Reading

Current rethinks RSS for the modern reader. Your feeds flow like a river. No inbox anxiety, no unread counts. Just beautiful reading.

Current
@SMillerNL I did try it, and I quite like the idea of different feeds having different content velocities! But it doesn't have the filtering options that I need.