What do you mean by "Noise problem became worse" and "Clock problem becomes better"?

How do you differentiate between them?

Could it be that the Switch Mode power supply is used on the same power line as your other hifi components. So that the SMPS noise is actually not coming from the ethernet/clock path but rather thru the powerline and pollute your other devices that route instead?

There is an aspect where clocks seem to interfere (sound becomes darker), while everything else is still perfect. And there's an aspect where the sound just decreases. Less good soundstage, less natural, more unstability, less insight, etc

No it doesn't matter. it's completely on another power source and ground system, but also on the same power source it has the same outcome

I started with a no-name ethernet cable from my router to my streamer, and now i've ended up with the following.

Incoming Fiber converter powered by an Sbooster with an Isotek Initium   -

Siltech classic legend etherenet with a IFI network silencer into my Asus rt-ax82u also powered by an Sbooster with an Isotek Initium  -

Siltech classic lengend ethernet from router to an ADOT MC03 with a Chord shawline dc chord to a Plixir elite bdc with an Isotek initium. -

5m fiber cable from the ADOT to my Melco s100 also with the Chord shawline and Plixir with an Isotek Initium -

Siltech Royal crown signature from the Melco S100 to my streamer.

The whole network is powered buy a Isotek Aquarius ev0 with a Synergistic research purple fuse into the low outputs, the Aquarius evo 3 uses a Isotek Seguel evo 3 power cable into a Furutech ncf outlet which connected with gigawatt lc-y evo 3x4 installation cable with a Gigawatt 16a circuit breaker.

Each and every piece of the puzzle made a significant difference.  I'm the type of person where if i THINK i hear a difference ,then it's not acceptable , either you hear a clear difference or you don't.   That's just my 2 cents worth.