"Winner writes the history" is largely bullshit. 90% of the narrative about the third reich and WW2 right up until recently came from the very Nazis responsible.
I look at history as what the world thinks rather than just one country, and still Armenian Genocide history was a close call. Took a long time for other countries (over 100y for the US) to recognize it due to fear of retaliation, and Ottoman Empire was debatably not even a "winner."
If the winner wouldn't write history it wouldn't be a problem to talk about
- Holodomor in Russia
- the genocide on the Armenians in Turkey.