I used to use Apple Music, and never brought playlists over. Also used Spotify and TIDAL, but recommendations were never great on any of these.
Honestly Spotify's smart shuffle has been the best for me, but you have to have curated playlists for it to work
I use lidarr on steriods (it has deemix built in, but deemix seems to have been abandoned. it still works for now though) to download flac, and then I scrobble what I'm listening to with Last.fm. I've found some great new music through last.fm's suggestions.
There's a python application for managing the meta data better than lidarr called beets. You need to be familiar with a terminal, but it has a ton of plugins and options. If you want a GUI, try MusicBrainz Picard, but it's old and not great on really big libraries. For playlist suggestions, plexamp can do that, but only for music you already have.
To back up what's already been said, you could use another service to create playlists then use a service like SongShift to replicate it on your platform.
A word of caution though. It might not always pick the right song you want from the album you want. Like, you might get a live version or you might get a version from some random compilation album (especially jarring when the album art appears).
You could also just export from SongShift to a CSV file, if that's your jam.
I've always thought the recommendations from Apple were off. I remember that any time I'd play a grunge playlist, it would include Pink Floyd. Last I used it, I thought Pandora was pretty good.
Pandora will play a lot of repeats :( it also seems to stick to "safer" (eg popular) songs. I've had much better luck with YouTube music. I've found a lot of eclectic, but very good, music using it.
This is the exact reason I switched away from Qobuz. I’m currently using Deezer because they also have flac streaming and it’s an easy recommendation from me.
Unique case here. Qobuz sells songs. I have the Sublime tier. It's a temporary subscription for acquiring albums for a discount while not losing access to HiFi.