The complaints appear to come primarily from PC users, upset that the game is a console port - and even includes references to turning off the 'console' when saving. Most anger, though, seems to be directed at the online store - which is already filled with downloadable content.
The volume of day one downloadable content seems to have come as a surprise to many PC users, unused to the console-style arrangement. They have also expressed disappointment at the game's short running time and the controversial ARG promotional campaign - which tempted players into buying unrelated indie titles.
Halo wrote on Apr 20, 2011, 13:41:
As far as I can remember there has always been "hallway" loading in all of the other Valve games. It's like Portal 2 is the first game they've played.