Edit for clarity, I'm talking about when someone holds their sword in the grip where the blade is pointed along the forearm, instead of the usually grip, where it's an extension of your arm. I clearly don't know how much general knowledge people have about swords.
Bit of a rant here. It's like the smallest of nitpicks. It's not a big deal. But I also wish people in charge of how swords in media are handled had to just hold a sword for an hour, because it's immediately obvious how impractical that technique is.
I've had a medium amount of sword handling in my life which is probably why it bothers me so much. Minor amount of 16th century swordplay, 4 years of fencing, half a year with Kung Fu sword form. Not an expert, but enough to know how the muscles work. Holding it backwards puts a huge amount of strain on the wrong part of the forearm, forget blocking or deflecting, shorten your effective range by almost the entire of the sword. You might as well just be punching the dude.
Technically you could argue for some amount of reverse grip. Could potentially catch someone off guard, but also they could just stab you. With a short blade an icepick grip is entirely viable. That's not generally how it's presented, it's depicted as a main character style that implies more skill than the usual plebeians.
It just bothers the fuck out of me. I know nobody cares, and I feel like guns are misused much worse in media. But fuck me it's so annoying every time it comes up.
It bothers me how incredibly thin skinned he is. You could start an international incident quite easily with a tweet these days.