Ukraine had only two ways to expell Russia from their territory. The mass sanctioning/removal of access to SWIFT causing Russia to economically collapse or U.S/NATO direct military involvement.
The first strategy did not work and the second wasn't tried.
Funneling arms and money was a disaster. It prolonged an unwinnable war that killed probably a million Ukrainians.
Afghanistan was fighting an unwinnable war against the USSR until the Russians simply gave up.
Similarly the Taliban in Afghanistan were fighting an “unwinnable” war against the even bigger US military for two decades until the Americans gave up and simply left.
Why do you think the situation in Ukraine is wildly different?
Russian is resorting to suicide runs with golf buggies to capture land at the same rate at which a snail moves. Does this sound like an inevitable victory to you?
Is this what winning looks like?
But there is the aspect of potential over reliance on Western support by Ukraine, which if cut, the effects on the moral might even outweigh the effects on the defense capabilities, and both would be reduced given halt/pause of Western support
Stopping that is only helping the russians.
Did Germany stopped replenishing stocks?
Biden double dipped by booking military assistance to Ukraine twice, once as value send and again for replenishment thus creating confusion with Zelensky wondering where the rest of ~$177B go when they received $75B in hardware.