European history has quite a bit of dark periods, and events. I find it useful to try and understand as much as possible, as "we" are mostly Europeans originally.
I didn't learn much of it in school, that's for sure, some of my HS teachers were, well, at times incoherent, which I see around here at times. I have enjoyed reading about it on my own later in life. Much of it gets messy, humans like stories where one side is all bad and the other is all good, and history isn't really like that, though at times one side does look pretty awful.
Europe today MIGHT be in better shape had Napoleon ended up victorious. It can be debated ad nauseum. Much of what we read and learn about him was written by ..... who?