EDIT:
I understood how to solve this weird situation. Forget it.
My ps5 almost works perfectly. Never crashes or hard crashes. Rest mode and external 4tb HDD 100% functional. Downloads are really fast, Etc and etc.
HOWEVER, OH MY DOG, SOOOO annoying and driving me crazy:
I have a Pulse 3d headset and Blue Mic Yeti "pro". But my ps5 almost always refuses to understand that I want the Microphone to be one, and the audio output another. YES, I deselected the "switch output device auto".
If MIC for the input device is Blue Yeti, it changes 99% of the time in Audio Output> device for Blue as well.
The same happens when I do the same when I connect a ps5 headset in dualsense; He only obeys me when the audio output is TV or Soundbar, then I can choose the MIC in the Blue Yeti or the dualsense itself.
I tried several combinations, change first the output and then the mic, or mic and after the output. I turned on the "Switch output device" option to test if the ps5 would act the other way around, but it didn't work.
For some strange reason, just twice he DID what I wanted: The mic being Blue Yeti and Audio Output on HEadset. I just don't know how! So I was using it for a few minutes to see if something different would happen. Everything continued fine, until I had to answer the phone, heat up the food, and then of course, the dualsense turn off. When I reconnected, the same problem returned.
I'm trying to stay calm, but spending so much money on video games, games, etc the situation is pretty pathetic right now.
DAMN IT.
Sorry about my raw english.