Russia, England, the US are all experiencing the same thing: failing to hit recruitment goals. Between movies, games, and in particular social media coming out of Ukraine of kids getting shot at (and having to shoot back) in an active war, nobody wants to get involved in these things. From birth kids are exposed to the very grim reality of war, and voices both for and against it.
If nobody wants to go to war, how will government wage war? Russia is just barely hanging on to their immediate recruitment needs by sending their prison population through the meat grinder, and many of the best and brightest fled the country at the first hint of war. They all have (much, much better) jobs now and are unlikely to return before retirement age, if ever.
I think there's a lesson to be told here; going to war means your upper middle class will immediately flee, and your financial system will be kneecapped indefinitely. And also that nobody (who hasn't already been brainwashed) really wants to take a bullet for their country.