Its all about protecting market share. Baofeng is taking sales and they don't like it.
Who is 'they'? QST magazine is a function of the ARRL, who doesn't manufacture any radios, thus have any market share to be concerned about.
There's a lot more to it than just spurious emissions too. I have four Baofeng radios (a pair of 888s's, a BF-F8+, and a UV-82HP) in addition to my Yaesu's (FT1XD, VX-7R, ft277r, and hx370s, plus two mobile rigs.) The Baofengs are halfway decent, especially given the price, but there are a lot of things that make the Japanese radios better for many applications.
Durability:
All four of my Yaesu radios are waterproof/submersible and have been put to the test (well, except the FT1XD which I only recently bought, so haven't had it in a storm yet) and with the storm chasing/tracking/photography I like to do, that's important for me. Equally useful when hiking and backpacking. Those radios are also built like tanks with heavy duty chassis' and they can and often do take a beating.
Batteries:
I'll give the BF-F*+ (a uv5r variant) credit in that I love the aftermarket battery option for a 3800mAh battery. Doubles the size of the radio, but it's still well above the 1800mAh factory battery. That said, I'll be damned if I'm gonna leave any of those batteries charging when I'm at work or otherwise not nearby. I would bet money that none of the Baofeng batteries have any type of thermal protection circuit and when it comes to Lithium Ion, that's a problem. (Hell, most of the batteries have indentations for the positive, negative, and temp contacts on the back. Only two of those actually have any metal/contacts installed. Guess which two.) See the recent fun with those 'hoverboard' things for why I am as cautious as I am on this matter =)
Usability is subjective, so I won't even bother going into that.
I use my radios for everything from ham-nerd ragchewing on local repeaters to trail comms to public safety communications for local public events. The Yaesu's are what come with me into the field.
Oh, and for what it's worth, I think the biggest issue with the chinese radio market is that they do nothing to let buyers know how much trouble those radios can cause with interference, operation on public safety frequencies, etc. The Baofeng 888s pair that I bought came pre-programmed with 16 frequencies and one of those was a spot-on match for one of AZ DPS's main channels. That kind of crap *IS* a major problem. It wouldn't be so bad if they just set the band limits for amateur radio (which is about the only service most of those radios are even legal for, and of course still require a license) as that would at least isolate the interference potential.