I just need to vent. Advice will be greatly appreciated, Or even just talk **** with me lol?

My baby's father is such an asshole. He is verbally abusive, I mean dude went off calling me fat (which I admit, I really let myself go. I still fall into these depressive mood swings, idk) but I kid you not, I was just sitting there and he was talking his *** off calling me fat even like a child making jokes about me causing earthquakes and the crazy part, as soon as I snapped back and laughed at him mentioning the size of his dick, he shut up. 5 minutes later he was practically sobbing at me that what I had said was far worse than what he said. "I'd rather be called fat than told I have a small dick" lmao thinking about it now, what the **** was that? That's not even the worse part, he's quick to accuse me of being a shitty mother, even though I do nothing but take care of my baby, and if dare and bring up the crap he has pulled, another sob story. Or even "you wouldn't have had him if it wasn't for me, so that makes me more of a parent than you"....like am I being crazy to be bothered over all this? And the insults only got worse when I filed for child support. It took me nearly a year to really talk myself into filing, to really think "**** him" go forth. Wanna know what finally convinced me to do it? I had save $12,000 for my son. I saved that all on my own, all with the goal of adding more so that my son can do as he wanted with it. Preferably for a better education. He stole it all and refused to give it back.just can't handle his **** sometimes.  lol I AM LOOSING IT.