Wow! You set the bar high!
I’d have to add :
‘The Little Drummer Boy’ sung by any adult. It just sounds stupid unless sung by a child( and is it ever?) especially the ‘pa rum pa pa pum’ refrain.
“ Santa Baby”- just sleazy.
Anything killed by Elvis or Mariah Carey. The fist sounds like moaning death, the other tries to sound ‘sexy’ and screeches.
“ Christmas Shoes”- sentiment noted, but death in a Christmas song adds no joy to the season for me.
More later- I just turned on the continuous Christmas music station...
Last weekend as I was in my car running some errands, within a 30 minute span, the local all Christmas music station played all three that I listed plus two more that I would have listed had I caught the name of the song or the "artist". It was almost as if the DJ had thought to himself "how about I come up with the worst Christmas songs ever for one hellish segment that could drive people to commit suicide during the holidays?"