Oh but he did. He tried and failed. Ukraine is really Russian territory to him.
I'm no military experts but surely Putin could in theory bomb the shit out of Kiev with some of those hypersonics and what have you. To me, a complete layman, it would probably cost too much to totally take over, Russia would have to be responsible for the rebuild.
Regarding winning wars, you don't necessarily win just by being superior militarily. I mean most say the US lost Vietnam, lost in Afghanistan against some towelheads wearing skirts which are now supposedly stronger than they ever were. After decades of war. Against Iran, Israel + the US could easily "win" through sheer military superiority but if some results are like Israel having been bombed badly and the Jews have to relocate, did they really win? Some experts say the Iranians really exposed the vulnerabilities of Israel. They did a demonstration with zero, I think casualties, which was planned I think, but got through something like a dozen missiles. They also prewarned the US and Israel that this "moderate" response was coming. But what if instead of 300 drones and missiles they sent 1500 drones and sacrificed their most advanced missiles, what then? Suposedly, as they claim, they used old stock, almost expired stuff and not that advanced missiles. Of course at that point Israel might drop the atomic bomb and "win" but Israel might be fucked anyway. And you'd still have all the surrounding hostile states. BTW, if Israel were to fall, some say Ukraine would be the natural second homeland for Jews as supposedly Ukraine had the highest concentration of Jews out of any country at some point in the early 20th century.
I think the best hope for Ukraine is some type of act of God where Putin died from any cause. Ukraine admits they have lost without the aid package but while the aid might help a little temporarily many experts say it would not change the ultimate result of the war, some alledge these funds will have close to zero effect anyways. The US will not send any long range missiles, they have to be very careful with the way they will supply the airplanes, because Russia says if the take off from Poland or whatever they, the other countries, will be legitimate targets and Russia will shoot at the planes at their take off, supply locations. Is there any scenario where the Russians give or pack their bags and leave? Hard to see as thisis now prestige and outright existential for them, but what do I know.
Well that's my interpretation being an admitted dumbass on war matters