This is not a proxy war, neither EU or US are interested in Russian territory. They made it clear that no Western weapons are to be used outside Ukraine. This is defensive support for a sovereign state, not a scheme to topple Putin (who is the sole aggressor in this conflict without any formal declaration of war).
Furthermore, I’m having a hard time understanding your reasoning regarding US aid.
Currently, Russia is paying an enormous price while the US risks no lifes and gets to send its old weapons to Ukraine. This might not be a winning strategy for Ukraine, but it sure sounds better than an open war between 2 major nuclear powers which puts billions of lifes at risk or draconian Russian occupation of large parts of Ukraine.
Furthermore, I’m having a hard time understanding your reasoning regarding US aid.
Currently, Russia is paying an enormous price while the US risks no lifes and gets to send its old weapons to Ukraine. This might not be a winning strategy for Ukraine, but it sure sounds better than an open war between 2 major nuclear powers which puts billions of lifes at risk or draconian Russian occupation of large parts of Ukraine.