Helix amps sound nothing like HD or other POD amps.
Gotta agree with user error.
I've owned a ton, Axe FX Ultra, Axe FX II XL+, Kemper, HD500, X3 Live, Helix, Vox Tonelabs, etc... Anyone that subs their noses at Helix modeling is either a fanboy of something else, or doesn't know how to use this gear very well.
Fractal, Helix, and Kemper are all operating on a high level, and it's really mostly personal preference and such at this point.