I have make an effort to boycott Changi airport. It is my protest against the PAP, their incompetence and their high inflation.
There are a few airports (no lack of it) to choose from , Senai airport at JB and KL international airport. Admitted that you got to travel a bit to the airport, but to give the middle finger to PAP, it is totally justifiable and worth it.
Changi airport is not an airport, it is a shopping mall, IMO.