"Putler," you can never negotiate an end to the war, because who would negotiate with subhumans and "savages"? In other words, how can you do a deal with the 21st Century Hitler and his orcs? The end result of demonizing your enemy like this is you get an endless war, even when it is kicking your ass.
So, when the time comes when Ukraine is on the brink of collapsing, which will happen, the US will have two choices: negotiate with Putler or send in our troops and put us on the brink of nuclear war. It seems to me the current Administration will choose the latter. The next Administration, however, looks a lot smarter than that.