I'll paraphrase it:
"It gives me no pleasure to announce that I am leaving this once fine forum. Once upon a time it was a paragon of open and incisive debate on all matters Everton and beyond. In recent times it has descended into a hate filled pit where animals are desecrated in the name of throwing around cheap insults.
You pigs utterly disgust me. Have fun rolling in your foul sty of muck, snouts in the trough of low brow insults. Consho xxx"