1. If you think a small combo will ever get you close to an SVT-2 & 4x10 & 1x15, give up now, you're never going to be happy
2. If you find there are two many knobs, don't use them, set it flat, that's where the core tone of the amp is to be found
3. If you don't like the amp, you don't like the amp. I spent years trying to like gear because other people liked it. It means nothing. The only gear that you should like is the gear that you actually like.
But....... to be more constructive. The Walkabout combo is boomy, the radiator sees to that. Don't buy new cabs, just try the same head through a few different cabs - there'll be folks on here happy to oblige - and see if things change. I loved my Walkabout through a Mesa 2x10, way tighter than through the Scout cab and no boominess at all.