We were Molyneuxed real hard with this game, love being directly lied to by a company that is supposed to be different. Just like all the rest of them I guess.
Can you explain as to how you were lied to? I don't have any issues w/ you liking (or not liking) the game, I'm just curious as to how they actually lied to you. If anything, it was personal expectations as well as video game media who were hyping up the game to (possibly) unrealistic heights.
If you're playing the game solo, then I can imagine how one would find the game to be rather dull. It's just another "pick up quest, now go to XYZ and kill so-and-so, now bring ABC item back to me" game. However, in co-op is when the game truly shines, and in my opinion, is meant to be played.