Thank you for reaching out here in the Community!
You can only delete songs from playlists that you've created or from collaborative playlists that you have access to.
There's also a Don't play this button available in Discover Weekly and Release Radar playlists that you can use to tailor them.
If you like a playlist but it contains songs that you don't enjoy that much, you can always copy all songs, add them to a new playlist and delete the ones you don't like.
The easiest way is to use a desktop app:
- select all using keyboard CMD+A (Mac) or CTRL+A (Windows),
- drag them to the + New Playlist section
Now it's your playlist and you can edit it as you wish.
Furthermore, here's an idea posted to add the button to all sections. If that's something you're interested in, make sure to add your +VOTE there and subscribe to the topic. That way you'll be notified with all the future updates on that case.
For more details on how your feedback reaches Spotify, check this article.
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