Flight from Iberia to Panama, we have been on the ...

Flight from Iberia to Panama, we have been on the plane for an hour and a half because they are waiting to change a spark plug, then they have commented that the whole box must be changed. How is it possible that they have to change things now that we are already inside and in theory ready to go. Then they do not even bother to offer a glass of water, the crew telling themselves about battalions in their area. Iberia is getting worse and worse, and if it weren't because they almost had a monopoly on certain routes, they were probably going to ruin.