Comment by rcxdude

Pretty much everything about the US's actions regarding Russia and Ukraine indicate the opposite: they want to end the war and Russia's ambitions of expansion without a regime change (mostly because nukes: Putin getting close to losing power is one of the plausible scenarios where he would use them, to say nothing of whoever's in the mix in the power vacuum that will exist afterwards). If they just wanted Russia to collapse they'd be sending way more stuff to Ukraine (who is A-OK with Russia collapsing if it gets them off their land) as opposed to drip-feeding it in. NATO is far from a unified block in this regard: some members (generally the ones bordering Ukraine) are pretty aligned with Ukraine and basically sending everything they can, some are even more nervous about escalation than the US.