what is this clean slate upon death nonsense?

why is it that the moment someone dies it is like the world at large forgets automatically that person was a b*stard. it is like upon death they become cannonized. what is that! i had an uncle who beat me once, there i was in my underwear and he charged into my room and beat me. he was an evil man who cheated on his wife and drank a lot. all his kids were whorish to some degree with multiple kids. he chose to judge me unfairly and took it into his head to discipline me, when i was not his kid to discipline.

i remember how cheated i felt when he died because i did not get to rub my success in his face, to show him what i had done with my life. at his funeral the only reason why i cried was for my mother, her heart was broken. but i felt nothing for him, he did not automatically become some saint. and when i speak of him it is not with fondness, i do not romanticize him, he was a lying, cheating hardliving b*stard and bad father till the day that he died.

so to recap, there is no reason that i can see to romanticize the dead once they have passed on, why have fake feelings suddenly develop, if you did not have the feelings before some one passed on, why have them after?