"A-Hole Alternate History" is basically the term I give to of the trope where people seemingly go out of their way to make what likely is set to be a better history crappy, just 'cause (and often based on talking about what they don't know). I think its the overreaction to the other extreme of over praising and romanticizing, but is just as bad as any of that.
For example, on my own wondrous JFK end, given the POD of JFK living, Vietnam still occurs just like the OTL, Jackie leaves him, he gets impeached over sex scandals, JFK's presidency is destroyed, and he dies of Addison's in a year or two. And I can name a few others if I have time to think of it.
So, are there any other examples of this kinda deal anyone can think of?