I keep fighting with my fiancé's best friend

So my fiancé's friend flew in from out of state to hang out. This friend of his, we'll call Tom. When we went to visit him over a year ago, I saw how he treated his girlfriend and he's a real dick. He calls my man 24/7 about his issues and I hear everything. He blames women for all of his problems and never takes any personal responsibility for his mistakes and failed relationships. And when he opens his mouth, he is just so full of shit. Tom's arrogant and says he will call out others. So I called him out. I mentioned how he treats women, and he says I have "no idea what women have done to him" and I mentioned his girlfriend that he's so ugly to and ask what she ever did to him. He says that she's a rebound that lasted too long & that he doesn't give a fuck. They've been together for almost 2 years. He even told her to put the relationship on hold so he can fuck other people and THEY LIVE TOGETHER. After he's done blaming her, he blames his baby mama & then he begins blaming the city he lives in & how he wasn't like this until he moved back there (he moved to be near his son). And blames the women (of course) in that area for being awful to him. Tom sounds like a broken record with his bullshit. Never takes any of my fiancé's advice, and lives for drama. This whole thing started because Tom asked my fiancé why he doesn't take HIS advice for shit- my man just says "we're in different places in our lives & that changes how we perceive things." And Tom gets SO offended by this. The reality is, my fiancé won't take his advice because Tom has no success with his relationships. In an argument, all he cares about is keeping his pride in tact and ego inflated. I couldn't help calling him out. I even went back to make things not weird and I just went off again. It's like word vomit. I've dated guys like him. He just hurts people and gives no fucks. My fiancé is only friends with him because they've been friends for so long. He even called me "sweetheart" during all this & I ripped him one just for that. Like who the fk do you think you're talking to? His ego felt threatened so he tried to belittle me. He says I don't know him but he's so transparent & my fiancé tells me everything. Tom just makes my blood boil & he's so selfish and it makes me sick. He was going to sell a headset to my fiancé's other friend, but goes on about how he doesn't need the money. And Tom still owes my fiancé $2500 from years ago. My fiancé is trying to stay neutral. He knows I'm right but saying I'm just attacking Tom and it's counter productive. But Tom literally disgusts me. I've never been so confrontational, I'm usually a chill person & really introverted. I'm so tempted to tell my fiancé to distance him as a friend but I feel like that's a shitty thing to do. I feel like it's my duty for women everywhere to put this asshole in his place. Help? Edit: Tom says my fiancé is his BFF but my fiancé doesn't find this mutual