It's probably the recordings or the fact that you're just previewing streams
Bandcamp allows logged-in users to download music that they've added to their library in a number of formats, including lossless FLAC. Streaming probably downsamples to mp3 or something equivalent, but your fans can get a version with the exact quality you uploaded.
Other pros of bandcamp include:
it's the industry standard for offering digital music along with analog physical media.
It's free to you as a musician to use the platform; they take their 15% when people buy downloads.
About once a month, they will waive their cut and either let the bands keep 100% of the purchase price or donate that 15% to a worthy cause.
It's a good platform for streaming an entire album to preview it or after you've purchased it
They accept Paypal, so it's not a difficult threshold to get people to buy
Cons of bandcamp include:
Not a great day-to-day streaming service.
They are actively fighting their own employees unionization efforts.