The solution to Russia is
1) giving Poland a three nuclear weapons. They only need one, really. Russia is a one-city country.
2) giving Ukraine 1240 javlin anti-tank missles, one for each nuke they gave up in 1996 under the Budapest memorandum.
3) US and NATO withdrawal. Yes, withdrawal. In a planned, organized way while empowering an Eastern European alliance. Right now the best that eastern Europeans can do is beg for help. NATO and US is a quagmire of politics and conflicted interested. An Eastern European alliance would have much more freedom of action. All the parties remember the hell on Earth that Russia created in their societies. They understand the threat. Starting with Germany, the West does not understand the threat.