3. Annabelle Apsion as Monica Gallagher on Shameless

Who is worse than a deadbeat dad who doesn't care or provide for his family, sleeps with his son's girlfriend, steals money from his kids (and takes out new cards in the younger one's names, thus fucking up their credit history before they can even own a credit card themselves), and gets so wasted on the daily that his kids actually end up taking care of him? Monica Gallagher, the mother who abandoned her kids with him in the first place, that's who.