I won't usually shut off a tv show or a film if I dislike one of the actors in it. Hell, I can [usually] watch Kevin Bacon films without too much of a problem.
If we sit down to watch something on the telly and I happen to catch even a hint of John Malkovich, we will be promptly changing the channel.
He never shuts up. I feel like he makes up triple the lines they actually give him in the script of every single film in which he has ever acted.
The biggest insult to my soul by far was the film Dangerous Liaisons. They have turned that book (despite being written way back when, it's actually a very good book) into three different films: Valmont, which had a great cast but kind of butchered the story; Cruel Intentions, which even though it's set in the 90's instead of the 1700's is probably the truest to the book; and the 1988 film Dangerous Liaisons. John Malkovich was cast as the main character, Valmont. The same character played by Ryan Philllllipppppe in Cruel Intentions. The guy who is supposed to be this major man-whore, who is so charming and gorgeous that he gets to screw around with pretty much everyone without making much of an effort.
Let that sink in. They cast John Malkovich as this guy.
John Malkovich is like the opposite of the charming gorgeous man that women find irresistible.
That is all.