So i installed guitar rig 5 pro after 4 years of not using it.
And wow i was amazed how good it souned. Alot better then the kemper.
In play mainly clean rockabilly' ish tones so i do not judge crunch overdriven tones.
Like MANY people here . I have the same problem . Headphones with kemper WOW . FRFR or Studio monitor NAH .
But nobody seems to knoww were the problem lies.