So how would you solve it, Maddyone? Or any other poster who thinks we should send in a gunboat or two.
By going in with all guns blazing, so that Putin then has every excuse to "defend his country" against the "Western conspiracy" to attack it?
By pleading with him to be merciful and spare our little island, so that he can say "Sure, just add yourselves to the countries under my wing, and allow me to be a part of your government and your law-making processes, and to collect taxes from your citizens, and conscript them into my army and . . . etecetera" all of which would be the equivalent of invading and defeating us, without the cost and effort of actually declaring war.
Did you read the paragraph where I said "You win by influencing more people than your enemy does to believe that you are in the right, by persuading them to resist in subtler ways, by resisting yourself all the subtle ways that you are being undermined and infiltrated."
That translates as taking active steps to influence world opinion of his tactics, including opinions inside his borders. You seduce (politically! - or perhaps not just politically, Mata Hari had her successes) his lieutenants and make it more attractive to be pro-West than anti-West. You seduce his citizens with international artifacts, fashions, music, culture, so that they are dissatisfied with the version of life they currently have. You show them the freedom of choosing between differing political parties, instead of elections with only one candidate. You use subtlety.
In short, you exercise diplomacy which is not just sitting around a table discussing things straight out, face to face. You also counter all the "diplomacy" that his envoys and ambassadors are deploying in their turn. Remember the "golden showers" incident that Trump was involved in? That was Putin's kind of "diplomacy".