Diablo3 is being played massively after almost 9 months and patch 1.07 is adding again a good new mechanic to the game. The mechanic of crafting some gear independant of the AH as it is bind on account when crafted.
Those playing the AH don't need to panic as lots of gear will still be traded or grinded, but it is proof that Blizzard polishes this product further and further.
As such the OP opened a gate of showing how ridiculous this so called "general hate" is against an ever more polished game.
After 9 months everyone agrees that the engine, smooth and fast play mechanic is second to none. All the rest is put on top and is really personal preference, like stats blablabla, meaningfull story blablabla, legendarries blablabla and not like a built in AH blablabla (that WAS there all over the internet in D2).
As such the hate around D3 by some twisters has NOT even been constistent. By consistent, I mean the order of those so called complaints and their focus ... It Changed according to the evolution of patches ... Going from on line only, to server controlled, to too hard to too easy, to legendary stats, to "session spoofing lies and fake hacked authenticator"...
Swapping under the door mat such great added things like Paragon MF long term play, adaptable Monster Power play, key hunting and Machinery crafting etc...
So these Blizzard haters tune constantly their preaching, searching some allignements with players who simply played too much for 6 months straight.
As such the "hate preachers" - with cross in hands - are less and less credible, since like you stated: hundreds of hours played in ONE game is not exactly something you do with a "mediocre" game. I had to laugh because "sucks" has now already been replaced with mediocre to actually gain some sympathy.
BTW: you'll see the exact same with every new Blizzard launch. Expect to see it in SC2, Blizzard's Dota and of course ... A massive hate on Titan the moment it will be launched in beta.
And this time the dudes will simply attack Jeff Kaplan and Rob Pardo. Yes I know, they will attack the makers of a 10 billion dollar game (WoW Vanilla). It is just how these haters have a non life really.