When Levi Johnston is criticizing your parenting skills, it may be time for some personal reflection. Johnston tells TMZ he's been watching Bristol Palin's reality show and is "disgusted" by the behavior of their son, Tripp, who, in one recent episode, used the F-word to refer to Aunt Willow. Tripp is getting "no real parenting" and is on a "downward spiral," Johnston says, adding that his son "deserves a better family." Apparently Levi's idea of a better family is a broke dad and his pregnant girlfriend, because he has picked up the paperwork needed to try to obtain full custody of Tripp. (More Levi Johnston stories.)