It's absolutely absurd that in 2023, the largest tech company in the world cannot find a way to not show me recommendations for books it knows I have already read.
I also get irrationally enraged anytime Goodreads gets confused about multiple formats of the same book. Oh, I have read the paperback version of The Way of Kings, but surely I need to be recommended the Kindle and leatherbound editions, too, as those are completely different books!
I had been using Podcast Addict for a couple of years after switching from BeyondPod which I used for many years.
But now I'm using the open source, community-built AntennaPod. There are a few quirks I had to get used to, but that is true of every app and especially something I use so frequently throughout the day. Performance has been great, especially with audio casting which has always been buggy and inconsistent for me with other apps.