Russia has now declared "partial mobilisation" which seems to in practice mean "total mobilisation for poor people and ethnic minorities". Can't see that being a good way to get motivated troops who won't surrender.
It does strike me that Russia's modern strategy, essentially apathetic authoritarianism, is historically unusual and possibly a specific post-Soviet thing. Rather than firing up the Imperial core (Russians in Moscow/St Petersburg/core cities), the system specifically relies on them not really caring about the government, in order to avoid criticism of the regime. Most historical states would have taken a far more brutal approach to resistance and simply tried to directly legitimise the appropriations of the elite, whilst modern Russia has never really tried to shove them in people's faces (which arguably dates back to making the Soviet case for imperial legitimacy, and also may stem from a general fear of popular revolution and unrest in the mindset of modern Russian elites where those in other countries would try to tough it out). In Putin's Russia there has been, I think, some sense that building a hyper-neo-Imperial ideology would be dangerous and hard to control, the Communist ideological case is no longer in play, so there's nothing much there except the stability of utter inertia. You can't build an empire that the Imperial core doesn't see the use of and isn't prepared to die for, and Putin seems to be finding that out the hard way.