I won’t claim to know the best way to beat a Russian invasion quickly, but in any case such a thing would be obvious from a mile away (like their invasion of Ukraine was), so there’d be ample time to prepare. Meanwhile if you want to prevent a Russian invasion the way to do that is to pump as much money and weapons as humanely possible into Ukraine while cutting off Russia entirely. Resources are limited, so doing one will naturally compromise the other.
I won’t claim to know the best way to beat a Russian invasion quickly, but in any case such a thing would be obvious from a mile away (like their invasion of Ukraine was), so there’d be ample time to prepare. Meanwhile if you want to prevent a Russian invasion the way to do that is to pump as much money and weapons as humanely possible into Ukraine while cutting off Russia entirely. Resources are limited, so doing one will naturally compromise the other.