Although I did not get to all the airports, I agree with those who claim that Detroit Metropolitan (DTW) is one of the worst airports:
Last year, I was on a flight of Northwest Airlink (Mesaba) connecting
Montreal-Dorval (YUL) to Detroit (DTW). Our plane of NW Airlink, which was scheduled to take-off at 6:30 AM unfortunately left Montreal with fifty minutes of delay. Once arrived at Detroit, I was to take another flight going to Washington, D.C. If I had not had to run during twenty minutes in the dark corridors, crammed, filled of obstacles and sinuous (...and badly indicated moreover), I believe I would not have missed that plane...
So, having missed the plane, I once again had to cross the terminal full of travellers running in all the directions between the Northwest's shuttles which never ceased hooting. After a long walk (or rather a race!), I finally found the Northwest's check-in counter where I was transferred to the next flight with service to Washington (DCA).
I often had to run not to miss the plane, but I never yet had seen such an annoying airport.
I don't believe that Newark could be included in the category of the most annoying airports.
I went there twice including one where I was in a hurry to join of my plane. I liked the monorail. Any aviation enthusiast should appreciate the splendid point of view which it gets on the airport.
On the other hand, I must say that I was disappointed by the architectural vacuity of this
airport. In the unit, one finds oneself in large white corridors and very echoes.
I also found that the indications were rather poor, especially for the monorail, than one puts
much time to join.
However, this airport is certainly not a masterpiece of esthetics and functionality, but I did
not hate it.
Montreal, Qc, Canada.