When it comes down to it, I recognize my knowledge of Bolton is almost entirely from media sound bytes. From that perspective, he always seems pro-USA and anti-UN. I like that.
I don't know how much I dislike him so much as I don't know that I trust him especially if he wants to get us mired in more warfare. He is also one additional person in a list of people who have gone full Anti-Trump after leaving his administration. In general, most of those people have said things I don't like after going Anti-Trump (not just the anti-Trump stuff).