Sorry to hear you’re having problems with Roon. Have you tried getting advice on the Roon Community?
I trialled Jplay for IOS as a cheaper alternative to Roon. It works on an iPad but needs a to have a UPnP server like dBpowerampAsset.running.
https://audiophilestyle.com/ca/reviews/jplay-for-ios-and-ipados-review-r1213/
It reputedly sounds better than other applications because of low network traffic.
It’s very like Roon to use. Unfortunately, it didn’t work for me because my streamer wasn’t compatible and wouldn’t play gaplessly. So I have kept on using Roon.

