Ex Cargo Clown
These "cowboys" as you call them are doing a smashing job at offering low fares from Northern Airports, where Easyjet & Ryanair do not provide the destinations or fares that they so often advertise heavily.
Think you hoping to take them out of business is wishful (if not down right stupid) thinking on your part, and as someone in the airliner industry I would have thought you would have known better than to make such ridiculous comments.
Judging by what you wrote, Jet 2 seem to have offered you to change your flights for 2 8days around your date of travel, now if that isnt enough time to re-arrange then I dont know what is to be honest.
Don't suppose your a tree-hugger or ex-employee of Jet2 who is trying to tarnish their reputation are you? Seems that way to me...