There's the distinction. To you, subjectively, they may not be particularly special, but their success objectively says otherwise. Asserting that they aren't seems like indulging in wishful thinking.
"Special" is a bit of a loaded term that can have different implications, so let's just say they're different. From there, we can begin the real argument, which is distinguishing how they are different.
For your use case, acquiring raws, I'd agree they aren't inherently the best vendor for that. If I were ordering raws, likely I'd pick a vendor with good pricing, order a test batch, have that validated by a lab, and then follow that with a much larger order, again having that validated with a lab. With those two transactions done, likely I'd be set for that particular compound for years, but that's not what I'm looking for, which is a variety of compounds, reasonably well tested, and produced in volume.
For a variety of things, QSC moves the most volume. They've proven a willingness to adapt to the needs of the market. They are the most tested that I can tell, and have the largest target on their back if anything goes awry.
Tracy's attitude with idiots is fucking hilarious but he doesn't seem to be inclined to willingly fuck over his customers that aren't ethnically Chinese. I don't know how to describe this particular characteristic any more articulately, but I've seen it in other industries where oddball Chinese vendors have exceptional success in western markets.