No! Not at all. The Atlanta airport is actually really easy to navigate, especially when you remember that it's the busiest airport in the whole world. The concourses in the airport are labeled T, A-F. There are walkways and the Plane Train between all of the concourses, with the train taking about 90 seconds between each concourse stop. While some airlines are contained to one or two terminals (Alaska Airlines in D, United Airlines in T, American Airlines in T and D), others are more spread out. The Atlanta airport is one of Delta Airlines’ biggest hubs. Again, all international flights are in the same area meaning airlines like Air Canada, Air France, British Airways, Lufthansa, Qatar Airways, and Turkish Airlines will all be in terminal F.