One more thing. ...About, "the man is as revolting as the puss running from an open sore on the rotting carcase of a dying ravenous dog.", that's kind of tame don't you think?
But then again, off the top of my head I can't find a more appropriate analogy so I guess yours will have to do.... for now. ;^)
How about he is as irritating as a mustard seed stuck under the false teeth of life?