BFS has 58,000 aircraft movements per year.
BHD has 36,000 per year.
LDY has 2,000 per year.
The airport is handling half the passengers it did 10 years ago. The problem however is not caused by lack of passengers but by lack of flights. If more flights operated, there would be more passengers.
Ryanair operated successfully at the airport for years. Stansted operated for 18 years, Alicante for 9 years. Ryanair did not lose money otherwise they would have pulled the plug. When they finally did, it was due to relocating to BFS not due to LDY itself.