Your anecdote is irrelevant. Carrying a gun is not a rational decision for most people because it increases the risk of harm to yourself and others regardless of how you feel about it. I’m not saying this guy should be in jail for defending himself either, but he ultimately was not in mortal danger and wouldn’t be facing charges if he didn’t have that gun.
I went third party in 2016 because I was disgusted and at the time I didn’t think my state would ever be anything but red. Since then I’ve learned that I am very much in a swing state and Republicans have made it very clear they are going full fascist. There is at least one conservative think tank spreading the idea that we need a “Red Caesar” which sounds a lot like Mussolini to me. I don’t know if it’s possible to shift the Democratic party further left or not at this point, but I won’t be voting third party again unless there is some massive change in the way we handle elections.