This doesn't surprise me in the least. I'm noticing lots of fake artists on Tidal as well. Or if not fake, they're named the same as other artists like Tricky and Beck and so they get lumped into the same track lists and suggestion posts.
Have not heard of Deezer. I used Spotify for many years but dropped them about 3 years ago and switched to Apple and it didn’t take me long to assimilate to their interface.