Do I think Ukraine should exist as a country? If they can keep it, yes. If they can't, then no. Thats the answer I'd give regardless of the nation in question. The Aztecs no longer exist because they could not keep their country, communist Cuba still exists (where I just came from) because they resisted us successfully. Whether I think a place should exist is irrelevant, it can or cannot based upon its merits.
As a practical matter, I do not think we should continue supporting Ukraine financially at the scale we are because I believe it is a bad investment. Germany is the richest country in Europe, why are we doing so much more than them despite them being closer to the threat? The simple answer is they don't feel threatened by Putin which should cause us to reconsider our own conclusions.
Russia's invasion of Ukraine is terrible. It has created massive human suffering and death. They are brutal. However, I am personally unconvinced it is more than a regional dispute, and I don't think it's good policy for us to get involved in every regional dispute. Also, there is value in being able to understand your adversaries position. 99% of people blathering about Russian misinformation every time grown-ups try have a serious discussion are simply retarded. "The first casualty in war is truth" is an ancient concept. I get it, there's bullshit on every side, words are weapons, etc. But if you cannot hear a different perspective because you are convinced it is acidic enemy propaganda that will poison your resolve, you are an idiot and your opinion is unworthy of further consideration. We have those people posting here, who claim a self-righteous halo for their willful blindness. People who don't question their own assumptions while being sure other positions are wrong, who insist there's a morale obligation to act regardless of consequences because it's worth the risk even though we don't fully understand the risk, certainly we don't owe citizens a COA analysis but of course we're doing this for democracy, and if it doesn't appear to be working just shut up and keep doing it!
Eerily similar to what our country saw during Covid, BLM, climate "crisis" .... but I'm sure that's just a coincidence and not an indication we are being manipulated for political reasons.