I disagree. I for one don't read comics and I know nothing about the comic Mandarin. I felt that IM3 Mandarin was a very cool mysterious villain that was more interesting and threatening than another morally defunct CEO with visions of global power. The promotional work for the movie made him look like a total bad ass. The fact that Tony Stark just declared war on him and he shows up essentially wipes out his life was a great build. Then they completely pulled the rug out from under everything they had built and left us with something far inferior.