This. There is no better alternative music service, but just yesterday I reinstalled Antennapod for podcasts. Spotify did a great job getting me hooked on some podcast shows, but the UI changed (need more taps and travel from the lowest to the highest button on my phone screen every time I want to use it) and features broke (e.g. it needs internet to list downloaded podcasts such that I can press play on one of them). After half a year of waiting for them to patch this worst of bugs I've given up and moved away. But yeah not everyone is going to remember using a different and open source podcast app years ago and can easily move back, most people will just stick with it. GDPR's automatic data transfer clause could really be put to better use.
For music I can't simply install an open source alternative. That I make a backup of the apk before hitting update says enough I think.
Glad to hear you switched away from listening to podcasts on Spotify. Their attempt to buy up a huge number of podcasts in the last couple of years, which resulted in exclusification of some of those podcasts, is an awful development in the previously free and open podcasting community. I love podcasts and I'd prefer to be able to keep listening to all of my favorite podcasts on whatever app I want.
But also before moving away, I was subscribed to one of the ones they made exclusive, Gimlet Media's something-science I think it was called. Enjoyable and fairly informative much of the time, but if they are going to create a gated community I'm just not going to be part of making that a success, so I immediately stopped listening & recommending it and unsubscribed.
For music I can't simply install an open source alternative. That I make a backup of the apk before hitting update says enough I think.