You keep missing the point
A320fan.
It is the lack of transparency with the total to be paid that people are complaining about.
With Jet2, there is
the fuel surcharge, which should be part of the fare and visible on the first or second page. It should not be added later in the booking process. Yes, it maybe legal and you brag about your qualifications, as if we wanted to know.
Perhaps Jet2 should spend some brass and have the website reconstructed, although then people may not be misled into choosing unnecessary chargeable add-ons, by the sequence in which they are presented.
After all, not every body has had the education that you boast of.