It can definitely be tough to find a reliable, easy way to purchase and download high-quality music without dealing with a subscription. Based on your needs, I recommend checking out Bandcamp for indie music, but if you're looking for a larger selection, sites like HDTracks or 7digital offer high-quality downloads, including FLAC and WAV files. They also don’t lock you into a subscription, which is perfect for those who prefer to buy music outright.
As an alternative, if you're interested in having flexibility with your music library and prefer a smoother download process, tools like DumpMedia Any Music Converter can help. It lets you easily convert music from streaming services into formats you own, offering more freedom with your music.
Hope this helps!