That's because it's somewhat inaccurate. Dr Aldrin is all for commercial space flight. Dr Buzz Aldrin is (Apparently) upset that NASA had 7 years from the decision to end the shuttle program to come up with a working replacement and they failed.

The Dr Aldrin is a legend, and so is Neil Armstrong. It was Neil Armstrong and Gene Cernan who did the criticizing of SpaceX, not Dr Aldrin.