He would also go way out of his way to be, whatever the hell it was that he decided to be. I put up with it at two different forums.
I once years ago took pains to post a detailed and picture laden thread for the forum of me repairing a classic S&W wheel gun, the first time I had one apart.
He railed at me for taking a Smith revolver apart because I wasn’t a qualified S&W smith. And then because he didn’t like the tools I was using, and then he was distressed at corrosion he saw on the inside of the gun that was actually a reflection of the red shirt I was wearing. That gun was perfect when I finished.
He had tremendous capacity to be good for the community, but unless he decided he liked what you posted, he could be an unmitigated a$$hole, early and often. And across two forums in my experience over a decade.
I finally PM’ed and told him to stay the hell out of my threads if he did't have anything nice or constructive to say, and all I got back was a foaming-at-the-mouth, unhinged tirade of expletives.
...and the damn horse he rode in on.