Groon
kiwifarms.net
That's all germanic countries.I don’t think it’s so much the anime, as the fandoms around the anime? Presumably people are watching anime in a variety of dubbed languages/subtitles through SE Asia and beyond, but the countries with escalating troonery are either English speaking or those with a near universal high standard of English as a second language (eg Scandinavia, Germany, The Netherlands).
Kids and young adults from all western or western influenced countries facing related issues. Videogame, porn, anime, loneliness, neet, internet addiction, etc.
But, for some reason, troon's curse gets worse in historical germanic inhabited/colonized lands. Specially anglo countries. Something went really wrong in Odin blessed nations.