My preference would be this...
To the B!tch-in-charge
I'm glad I'm out of here, you pathetic bloodsucking morons. You got
no life. I'm really happy to say that I didnt decide to stay on to
smell your stench. You stink like the sewers. Same to the lamers at
work. Thanks for being so nice, hypocrites. I hope you all stay
here and die with this freaking cursed company. You all deserve to
die.
KNNBCCB
From Your Faithfully,
lalalalalalala