MGS4 deserves a perfect score.
A 10/10 says to me it's a perfect game. My brother brought MGS4 over and I struggled with the non-intuitive controls the whole time.
For instance, in order to shoot around a corner in first person, you have to: get against a wall, push the sidle button, move to the edge until the camera pans a little, hold the R1 button to ready your weapon; while holding this, take your thumb off sidle button to go into first person (triangle?),and then you take your thumb off that just to aim with the right analog.
(note: I might have some buttons mixed up I dunno, but you get the idea)
I don't know about you, but to me that's just too complicated for a game that takes place in am active warzone.
Metal Gear has always had control issues, though.