I never could quite explain why I didn't enjoy dungeon crawls. Fortunately, in standard snippy form, Zero Punctuation sums it up here
starting at just before the 4:30 mark.
Whether he likes a game or not and whether I like a game or not I usually agree with Yahtzee's assessment of facts even if I don't agree with the opinions based on those facts.
For the d3 review there's a lot he got wrong. Some of which he even mentions getting wrong in the credits. For example right at the point you talk about he comments on the randomly generated dungeons which he thinks are the same rooms pasted with different corridors. This analogy is only true if you consider like 80-90% of the game the corridors and those corridors not being short thin empty rooms. Though he does have it right that a large portion of the game is about the fabulous pants. It's a game of killing and looting and never claims to be otherwise. The story is not even secondary in d3. Was anyone really surprised by the fact that Diablo is released so you can kill him as final boss in a game called Diablo?
That said I will still wait every week to watch ZP again and again.