I need to vent 😡😡😡

I love my son. Adore him. But his sperm donor is a waste of breath. I walked out on him when my son was 2 months because he lied about being a Christian, he publicly announced marriage was a waste of time, and wanted to put our son up for adoption so it could be 'just us'. On top of going through my Facebook behind my back (I had nothing to hide, he could've just asked, but he lied and hid it which bothered me) so we left. He has seen his son 3 times in a year and a half, the last time being almost 9 months ago. He has sent $500 total for financial support for the entire year and a half. He doesn't text or call or check in. I served him with custody papers so he's pretending to want to be involved probably hoping I'll drop it. I've set up 6 skype times with him to see his son, and he's missed them all. He hasn't visited, no child support. This 7th skype he finally shows up for ten minutes and says "well son, are you gonna wish me happy Father's Day?" First off my son is one and a half and not even paying attention to the stranger on the iPad. Second of all, fuck that dead beat piece of shit. I HAVE BEEN HIS MOTHER AND FATHER. My SO now has stepped in and is raising my son as his own by my side. No experience, and he's become the dad my son deserves. This worthless dead beat piece of shit damn well better Know He doesn't deserve any thanks because he hasn't done shit for him. Ugh. I hate dead beats. Anyone else?