What I see is you being exceptionally generic and vague and not really answering with any specific details, and keeping the argument so light on facts and information that it doesn't appear helpful.
Take the first part “Russia could do whatever without consequence”.
Why so you say that? Do you think the sanctions levied on Russia weren’t substantial? What should or even could Obama have done to that would have successfully reduced Putin’s willingness to act, without potential destabilization or massive publish pushback?
The second point again: Putin still seems able to do what he wants, no? He pretty much kept bombing Syria, has not been sanctioned or punished particularly hard for attempting to undermine American democracy, and assassinating dissidents on foreign soil.
Thirdly, most of the help for Ukraine started under Obama, how has the material assistance to the country changed? How has the punishment of Iran materially affected Russias ability and willingness to act?