We've been over this about 15 times now. Long story short: I usually can finish an RB mix in about 30 minutes. Better Off This Way took me 8 hours to even make it sound remotely like the album version. For whatever reason, the stems we got were completely unmixed and of low quality, and I can only guess that other authors who did ADTR tracks encountered the same problem.
Authors armed with a handful of plugins and little-to-no audio mixing experience can't be expected to match the mix done by a notable producer in a multi-million dollar studio when we get unmixed stems from the label or band.