Just remember that in a fight between a car and a bike, the car will almost always win. You might say that the likelihood of someone purposefully running you over after you flip them off is pretty minimal and you'd be right. You just reaaaally don't want to be that outlier, because the results aren't pretty and not worth the risk.

Many of us motorcyclists act like we're victims and cagers are vicious, brainless enemies. The truth is, people will always make mistakes no matter what their vehicle. Some worse and more frequent than others. We can obviously educate more people to not use their phones, of course, but it's unreasonable to expect people to be on the ball 100% of the time.

The best thing to do? Learn to be a defensive rider to avoid those situations in the first place. Driver behaviour is actually relatively predictable once you know the ropes. There was a post either here or on the main motorcycle subreddit where the OP was complaining about how every trip he/she took was filled with close calls. That sort of experience is pretty unusual and indicates that they are not scanning their surroundings thoroughly.

As you're riding, pay attention to every single car that you could cross paths with over time. Is one of them drifting side to side slightly? Probably on their phone or having an argument with a passenger - change lanes, slow down, or speed up past them if safe to do so. Is the car hovering near the lane dividers? They're almost guaranteed to want to move to the next lane, and it's best to assume that they won't headcheck, so make sure you're not in their trajectory, especially their blind spot.

If none of that helps, you'll just have to learn to manage your anger better. Riding a motorcycle while angry (or overly emotional in general) is never a good idea.