Easy, Vueling and BA are the three airlines I use most. They each have their own character and pros' and cons'.
I tend to fly out of London and Barcelona mostly and in all honesty have had very little reason to complain. Plus, though I have had indifferent flights I've rarely had a bad one. What problems there have been have generally been sorted out pretty efficiently.
Yes some of the ground staff/cabin crew, and pilots look not old enough to be out by themselves! But then time marches on.
I get a reasonable product for a decent price.