9LaGuardia Airport (New York, USA)

Despite being one of the busiest airports in the world, LaGuardia Airport (LGA) in New York has long been criticized for its poor layout, lack of amenities, and frequent delays. 

The terminals are outdated and often overcrowded, with passengers crammed into small waiting areas. Security lines can be excruciatingly long, and navigating the airport’s terminals can be confusing due to poor signage. LaGuardia’s proximity to New York City also leads to constant traffic congestion, further frustrating passengers.