The menus on Canon cameras are actually one of the best features and one I tout when people ask me for camera suggestions. Every Canon digital camera I've owned since the late 90's, whether various models of point and shoot, or five different dSLR models (including the 5Dmk3) has a menu system consistent with the other models.
Consistently bad interfaces are still bad interfaces. I own a Canon camera (among others) and the interface is not meaningfully better than the one on my Sony or my Nikon. They all have some strengths and lots of weaknesses. The fact that they are consistent across their platform is what I consider a basic requirement. It's kind of like getting excited because all of Apple's products share a consistent interface? They'd be idiots if they didn't do that. But that's not my point. My point is that their interface is just bad. It's awkward, inefficient, unintuitive, and ugly. I could live with ugly if it was efficient but it isn't. Consistency is nice but there is a lot more ground to cover to make the interface good.