The Airbus A380 is popular with customers for its spaciousness, although airlines are just now starting to really squeeze passengers into it like never before. However it’s never been popular with very many airlines.
Conceived of as a plane for ferrying large numbers of people between major cities, flying between the largest slot constrained airports where passengers might connect onward, the industry has gone in another direction entirely: point-to-point flying with smaller more fuel efficient jets that bypass additional connections entirely.