I'm not blaming them, I said "Which is mostly due to the nature of the IP than anything else." Zenimax only have themselves to blame.
However, if you're not retarded, you couldn't of been going into this game and really expecting to find some nerd fantasy of an open world Skyrim game made for 1000s of simultaneous players. That's an unreasonable expectation regardless of the title of the game. So to review the game and say "it's not Skyrim!" is kind of dumb because, well no shit it's not skyrim you should of expected it.
That's not to say that you can't criticize the game for being a retarded quest treadmill game with mediocre writing, voice acting, stupid quests, and shitty feeling combat. Essentially a bad rehash of the MMO genre with a well respected IP.