The parent that takes the most shit. Sure, if you had a shitty father, then go ahead and bitch, but not all of us did. Some of us had great fathers, who really loved us, and weren't assholes. Honestly, if you could see how much damage a mother could do to one's self esteem, you wouldn't even place so much blame on "dear old dad"
Dad: "Oh, nice. I spend all my life to raise a family, and buy them a house, and then my wife divorces me, and takes the house that I paid for, and my kids, so she can go off with some other man, and treat my own children like shit. But at least I got a tie for Fathers day, that makes up for everything"