Movie starts with a (I assume British) guy who wants to commit suicide but he does not succeed. He meets a local guy who wants to earn some money and tells him that he will kill the suicidal man.
But he is not a real killer, every time he tries, he fails. But other people die (for example some older lady is hit by rock by mistake, some cops eat the poisoned cake, etc).
I think it's Czech (not sure about that) comedy/drama/crime from around 1990-2010.