ChatGPT:

It was Christmas Eve, and the reindeer were getting ready to take off on their journey with Santa to deliver presents to all the good boys and girls. But there was one reindeer who was not excited about the trip.

His name was Blitzen, and he was a grumpy, bitter old reindeer with a drinking problem. Blitzen had always disliked children, and he took great pleasure in being mean and hurtful to them. He worked with Santa only because it gave him the opportunity to be cruel to the little ones.

As the other reindeer harnessed themselves to the sleigh, Blitzen was busy chugging back glasses of eggnog spiked with rum. He stumbled and slurred as he tried to get into position, causing the other reindeer to roll their eyes in frustration.

Finally, they were ready to take off. Santa shouted, "On Dasher, on Dancer, on Prancer, on Vixen!" but when he got to Blitzen, he hesitated.

He knew that Blitzen was in no condition to fly, but he also didn't want to leave him behind. As they flew through the night sky, Blitzen's drunken antics caused the sleigh to veer off course and nearly crash. The other reindeer had had enough and begged Santa to leave Blitzen behind.

And so, as the sun rose on Christmas morning, Blitzen was left alone on the rooftop, still drunk and bitter, as the rest of the reindeer flew off to deliver presents. He would spend the rest of his days alone, nursing his grudges and his bottle, never able to change his ways.