I think this marks the 5th time a Russian user has plain out insulted me over an app I write in my spare time and give away for free. France holding a steady second place with 1 insult.
This is ridiculous and I feel more and more tempted to uncheck "Russia" in "countries the app is avaiable in" in the Google Play console, but I'm also aware that will harm a lot of people who know how to behave as well (including one cool past contributor).