"horrible" == "different than the album" ?
"horrible" == "different than GH" ?
I wouldn't call this "horrible" or "awful" by any measure, but I don't know the original track. GH's version sounds like it scoops out the mids too much to my ears, honestly, but I wouldn't say that's bad either. It's just a preference: I don't like the classic "loudness EQ curve" found on consumer playback systems.
Also remember, RB will boost the volume of the instrument stem currently being played, altering the mix. If you play with different instruments next time, it will sound even different. Not sure if GH does the same.