Problem is, this letter started out with one unfortunate, yet understandable event, then turned into a rambling, unfocused rant about everything CO does wrong.
Since this complaint letter has so little focus, I don't see anything for Kellner to respond to except to say "Sorry you find 157 things wrong with our airline. It's quite clear that we can't seem to do much of anything to your statisfaction and that, according to your letter, JetBlue, Frontier and Southwest have a superior product. Better luck on them - Regards, Larry".