Fortunately during my 25 years I ran into very few yellers or screamers. The nasty ones would mostly just sneer, insult & intimidate, but even they weren't very common. Most of us just didn't want to be in an Army like that, and officers who behaved in that way earned no respect.
One of the worst for me, however, was a loud-mouthed Brigadier General (1-star) when I taught ROTC. He would come out to observe cadet field training at Ft. Lewis, WA, and you'd hear him driving up from a 1/4 mile away. That's because he'd had his jeep fitted with loudspeakers, over which he'd be playing Wagner's the Ride of the Valkyrie as he came!
Gentlemen, I do not make this up. He thought it would impress the cadets and inspire them, but of course these sophisticated college students were all laughing at him behind his back.
He was as loony as General Dreedle from the movie Catch 22, in that and many other ways. And when he wasn't playing Wagner, it was the movie music from Patton, specifically the theme used during the 3rd Army's armored push across Germany.
One time he came to our campus for a tour, and the officer ROTC faculty took turns briefing him. The Captain ahead of me got eviscerated, and was reduced to a stuttering, sweating wreck, the General finally terminating that officer's briefing prematurely as being a worthless waste of his time. And I was next.
Well, I figured if my career was going down in flames anyway, I might as well go out like a man, not a mouse. I decided I needed to get the upper hand with this guy, so I stood right in front of his chair to start my briefing, before walking over to my charts.
I deviated from my prepared remarks by telling him that our campus program DID feature the items he was concerned about, and that we DID do the things he wanted us to (not needing to point out these were the very things my fellow officer had just fallen on his sword over right before me). My gamble payed off, because he seemed to like my direct bluntness (bullies are often that way), and he left the rest of my dog-and-pony show alone, merely asking a few harmless questions toward the end.
My boss, our local detachment Lt. Colonel, later thanked me in private, saying I had saved the whole show, and possibly his own career. And he never forgot it, giving me wonderful efficiency reports for the rest of my tour there. The Captain got terrible reports, and he was "riffed out" not long after.
But as I said, fortunately these nut cases were the exception to my experience, and I always felt relaxed & not threatened in uniform, and thought most of my fellow officers, and the NCOs, were highly professional, dedicated & competent. I still think overall they can make excellent civilian employees, in the correct fields.