What the West is doing, is assuring that the fight continues. Zelensky makes desperate and sincere arguments as to why he should have a lot of advanced weapons.
He ought to save his energy.
Europe does not want massive amounts of adanced weapons and munitions sent to The Ukraine. The US can't just send massive amounts of materiel that would likely amount to far more than what has already been given to them out of the budget. Furthermore, if they had these weapons, one of two things would happen:
1) Ukraine would win, and even retake territory that was annexed in 2014, including Crimea and then what? Theyhave never been democratic. They have never been known for Western sensibilities. They are known for authoritarianism and corruption. They have little energy. OK, they have food. So you'd have an extremely formidable Ukraine, trained in the use of the most advanced weapons in the world and with stockpiles. Who actually wants that?
2) They lose somehow and Russia acquires state of the art military tech at the very time when Russian control of Crimea becomes indisputable. So they'd have a warm water port, maintain control of energy infrastructure and decades of technological advantage would balance. This would be absolutely unacceptable. This would be the end of American dominance of the earth. Putin and Xitler would begin to supplant the entire US sphere of influence immediately.
Clearly, the first of those two options is prferable to the second, but far more preferable still, is to drag this out and watch Russia become a vassal state to PRC. The struggle will then be between the two spheres of influence, US and PRC. We could still get PRC to step into a Formosa invasion quagmire. However, don't forget about Russia's nukes.