I do not think highly of Putin, no. One doesn't have to like Putin to be against western expansionism. I don't see this as goodies vs badies. It's one corrupt system against another fighting for control.
You seem to be confusing Russian expansionism as western expansionism. Remember, its Putin who thinks Ukraine isn't a real country (it is) and thinks it should be a part of Russia. He invaded because he's afraid Ukraine will be come a strong democratic country, which could weaken him domestically given that he's authoritarian. Therefore the correct way to look at this is that it is Putin who is fascist dictator seeking to invade his neighbors (Georgia, Ukraine, the Baltics, Moldova etc) if they don't capitulate to his demands. He is therefore the one in the wrong and must be defeated. It is up to the Ukrainian people to decide which direction they want to go in and they have done so. It is not up to Putin to decide what the public of a foreign nation have already decided for themselves.