I used to work with a former member of a moderately successful rock band (they had a song in Guitar Hero, for example). He'd talk a bit about the royalties he'd received. His royalties from Spotify were negligible. Like single digit dollars per month.

Think about a ~$15/hour job. A solo artist would need ~500k streams per month to hit that. Only the top fraction of a percentage of artists on Spotify hit that.

Music has always been a tough business with middle men taking the lion's share of the upside. Streaming services just add another layer of middlemen.