Not a listhp. One of those bad portmanteau words. Little things in history, any period, 'common knowledge', that really piss you off to an essentially unreasonable extent. Personal bugbears: They were shorter back then. They really F weren't, mostly, certainly not to the extent implied. There are good reasons for lower doorways and smaller beds. OK? They never drank water. Gah! FFS. Etc. People in the past didn't wash. No, they all wandered about with needlessly rotting itching groins etc. because a bit of water was obviously too hard to obtain. I hear all of these on a regular basis while mooching around old sites, overhearing guides etc. I hide behind the camera so they can't see my face... mostly. Yours? (It's in the Barracks, just because.)
That people in the past mostly died at much younger ages than people today. The average life expectancy was hideously low because of epic infant mortality prior to modern medicine, but three-score-years-and-ten wasn't some preposterous fantasy for most. See here for much more detail: Did Ancient People Die Young?
Most pirates did not wear eyepatches because they had lost eyes in battle (or to look cool)! See here for the highly probable reason: Why Did Pirates Wear Eye Patches?
..and of course "Churchill knew Coventry was going to be Blitzed" - I have spent many hours on F-Book arguing with the hard-of-thinking on this one.
GIs throwing an empty M1 clip on the ground so that Germans would poke their heads up. I was shouting at the TV when Dr WIlliam Atwater trotted that one out again
Fully armoured soldiers couldn't move easily. What, precisely, would be the F-ing point of that? Grrr.
Got around to this video from a few years back. Couple of proper nerds digging in over a drink. Very very good on assorted Firearms bullshit. Nudges towards the printed origin of 'Garand ping' arsery in first myth.
WWII myths that frustrate me: The idea that the Tetrarch was designed from the outset as an airborne tank and "Britain stood alone" in 1940. One from much later: during the Iranian embassy siege in 1980, council workmen or army engineers (accounts vary) removed bricks from a wall to provide the SAS with an entry point.