I wonder you seriously think that you can help him. Putin crushes the whole West and nothing helps. To fight with him no one wants, and voluntarily he will not change. Putin is cornered and he knows that if he surrenders then will be destroyed. Sanctions only affect ordinary people and, therefore, Putin will stop any attempts which can Wake people.
Sanctions aren't effective here...
In fact the problems are important:
1/ First Putin doesn't attack anyone on the outside (or anyone powerful) so we can't really motivate Western nations to attack him or Russia directly, they're not a threat to anyone to be honest, they're mainly attacking themselves. Putin is a dictator but isn't invading its neighbours, simply killing Russians.
2/ Putin has control on the whole European gas. That's freaking important. Without Russia, Europe would go dark in 3 days, they NEED the energetic supply, whatever they want or wish for they NEED it. That's a bit like Saudi Arabia for USA xD