You have been drinking up Russian Propaganda.
“the u.s. agreeing to leave Ukraine a neutral nation.” why isnt it up to Ukraine? An independent country has the right to conduct its own foreign affairs. It isn’t the US bringing Ukraien into NATO (unless Ukraine is being forced) it is Ukraine. If they view it as being in their best interests then by all means they should look to join. If not, not.
The rest of your post is largely riddled with whatboutism, what about IRaq what about China. (with a few fair points thrown in) but it is built on a distortion.
Bottom line. Putin is invading a neighbor not in self defense. That is wrong full stop.