Right away, what sticks out most to me is that is seems pretty clear you are not engaging in diplomacy much at all. I'll stick to some simple strats on how you can prevent being gang banged early on.
There's a lot to unpack whenever talking about Roma strategies/playstyles and I don't have the time tonight to get too much into it. That'll prevent factions from ganging up on you like this. You could also start out on N/N and once things get rolling you can use the Hardcore mod to essentially play on hard.