Related to the 'whatever'-screw, but I find this one most annoying of all:
Anglowank! - Sure, France, Italy, Spain, the Americas, Poland, and so forth tend to get screwed a lot, but you know who ends up doing the screwing most of the time? The Brits!
I've noticed that much of the English-speaking world seems to have this conception in their heads that past about 1600, England was basically destined to rule the world until 1945. All armies will wither before them, their massive, throbbing, manho-...navy will crush all resistance, and their economy will destroy all others.
Perhaps it's just because I tend to read history a lot, but this certainly isn't even limited to alternate history. Try asking the average person who won the Napoleonic Wars. If the answer isn't "huh?" it will probably be "Wellington at Waterloo."
Communist Russia Super Motherland - Another one that's kind of annoying. Russia after WWI must be Communist. There is no alternative. Certainly the White armies, if they had managed to organize, couldn't resist the MIGHTY SUPER DOOM ARMIES OF TROTSKY!
...Except that the Bolsheviks nearly bought it at Petrograd when the Whites surrounded them once...Only to fall apart because they couldn't agree on who was in charge.
(OK, maybe that's a little past 1900, but 1918 is close enough to the 19th century for me
)
Russia-stereotype - A bit related to the above, but it seems that if Russia isn't a brutal communist regime, it's a brutal monarchist regime. Full of drunkards. And they're all idiots. Because never in Russia was there a sober man who wrote plays or painted, and Russians certainly didn't invent anything useful, like, say, rebar. Or electric arc welding.
Russia is
always a backwater full of men in beards and silly hats who abuse peasants and aren't important to the story. In fact, they usually aren't even mentioned except as being cruel and stupid.
China-screw - I saw a related one earlier, so consider this my agreement with it. China gets the short end of the stick just because the decline of the Qing coincided with European expansionism. If a new dynasty had come along a bit earlier before things got
really bad in China, world history might be a good deal different.