I go back to early thoughts (from some), that we needed to treat Putin as a "rational actor", and try to find ways for a peace he would accept. In those early days, many thought Russia's military power was going to overwhelm Ukraine, and we had to somehow do all we could to prevent a human tragedy. We've already failed in that goal.
Once it was apparent that the Russian military was not going to just roll over Ukraine, focus shifted to making this crime too expensive to continue - to make the cost/risk not worth the ill-gotten gains for Russia. That hasn't worked either - and continues to cost the lives of Ukraine.
It is time for another focus shift. As others have discussed above, Russia's/Putin's end goal has not changed. And the cost does not seem to matter. Whether it is perception, power, people, or natural resources, we are not going to be able to "convince" Russia to change their objective. So now we have to remove their ability to pursue that objective. Accelerate the ongoing destruction of the Russian conventional military force. Remove their capability to invade any more of their neighbors. Send ATACMS. Send more Patriot batteries and more anti-drone systems. Help send more Russian warships to the bottom of the sea.
Anything less means (even more) prolonged misery for Ukraine, and a repeat for some other country in a decade or so. I've moved on from "let us be careful not to start WWIII" to "let us make sure Russia can't keep raping it's neighbors".