Streamed music sounds awful in my system and I don't know why ....

On the quibble, i understand that they enhance music with metadata (however, its not as great as they claim - not i'm a user since pretty much day #1) but there is no enhancement when my music does not play at all.  Sure, give me the full experience with internet, but don't block the core of my system.

I have already complained, as have many more, and note they slammed the door on it ever changing.  So the answer as you say is "enough people"....apparently not enough today.  So buyer beware.

Anyway - to the OP. Figure out the exact configuration that you are streaming. Its often hard ot find in a PC.  Next, isolate. Even my roon core is run on a custom, linear, low noise power supply of my own design.  beyond most peole's ability, but buying one is just a few $100.

Don't just react to "PC bad".  PC not bad, PC just opens pandora's box.

Excellent sounding streaming can be achieved with your PC in the right circumstances. If using USB, make sure your DAC has a good USB implementation and has Galvanic isolation. I’m streaming through Roon and Tidal/Qobuz and upsampling PCM as High as 1024X DSD with my Audio Holo May KTE DAC and HQPlayer. Even without using upsampling, it sounds excellent. You don’t necessarily need a dedicated streamer to achieve excellent streaming results! People who are telling you the PC is bad just haven't hear a well setup PC that had good results.

“Excellent sounding streaming can be achieved with your PC”
@willywonka 

What dedicated streamer have you auditioned and compared with your PC to arrive at your subjective opinion? 

Let me ask you a question. Under what circumstances have you tried streaming from your PC?  What DAC and how did you do it? Please be specific.

@willywonka

I had a feeling that you will avoid answering my simple query. I see that you have modified your original post. Would you be kind enough to tell the readers, how to properly setup a PC for streaming?