Well, Nato did expand toward them, Sweden and Finland, and what did Russia do? Did they immediately start strengthening their defences against these new Nato countries? Nope, on the contrary, the baltic bases are near empty of forces. It is concrete proof that Russia does not see Nato as a real threat, they know fully well that Nato will not be the aggressor. The whole Nato expansion excuse is the propaganda, and you are eating it.
That’s not enough, still. It should directly affect the rank too. Get low on behavior score, not only everything they already do, you will also start going down. Because rank is everything to those toxic people, it is the only thing that drives their toxicity.
The problem with mobas, and most modern multiplayer games, is the visible rank system. Back in the day, with only community hosted servers, people were playing for fun. Then multiplayer shifted to publisher hosted servers where you started playing with one click on the menu. To keep the matches interesting, you needed a system to matchmake fair lobbies, so here comes the ranking. But they made a mistake by making the rank public, because now the players are no longer playing for fun, they are playing to raise their rank - and losing even lowers their rank.