We're doing the right thing now
A no-fly-zone is out. That is the same as declaring war on Russia.
Sending jet fighters to Ukraine is probably out. Unless there's a way to get them to Ukraine without us directly doing it.
Anti air and anti tank weapons keep flowing. In fact those are being ramped up.
Sanctions keep getting tighter and tighter. Russia's economic collapse will make this war much harder for them to sustain.
The Ruskies will lose sooner or later. Quite possibly sooner. Let their army be defeated and humiliated, and hopefully whoever follows Putin will not be as bad.