i have Spotify Premium ( unlimited listening without ads )

the correct way to use Spotify is to search using keywords like "experimental" and then select "playlists" from the results.

this completely bypasses Spotify algorithm and simply allows you to listen to playlists manually created by other users.

you can try googling the names of some obscure genres - that will help you use the optimum search keywords.

personally i like new music so when i look at playlists i immediately discard any that weren't updated recently ( you can see the date every track was added to the playlist ) and then i also look for playlists in which the "custom" track order has recently added tracks near the top.

otherwise i will sometimes sort the tracks by date ordered - the problem with that is usually when people create playlists they start with best tracks so custom order is generally preferred.