Delta had some bad times last decade when Leo M. was CEO. Lots of bad decisions and don't care all around. Cancelled many flights out from under me, many time

Delta had some bad times last decade when Leo M. was CEO. Lots of bad decisions and don't care all around. Cancelled many flights out from under me, many times the last one of the night. They ruined lots of my days and if I had received some of the messages I wrote to customer service I think I would have replied "You are no longer welcome as a customer." Delta is my favorite airline, period. They have more than made up for a few rough years I had with them and their policies and products are much more reasonable to me than other airlines. I really only want to fly other airlines for something like a 'flagship route' of a foreign carrier.