I feel "betrayed" is also a bit strong.
I use MAN as much as possible and have done for many years but I will give a recent example where I "betrayed MAN" and headed for LPL
Simply choice.
Need to go to Lisbon for a weeks course, options TAP from MAN or Easyjet LPL.
Winner, Easyjet as their times allow me to come home on friday after the course. To remain loyal to MAN I would have had to pay for an extra nights accommodation and come back saturday, so a no brainer really, sorry MAG will try to do better next time
Answer is get as many double daily schedules (am pm)to the main European hubs and you will retain my loyalty. Not MAGs decision but it would work for me.