The US seems to want Russia to lose the war but not for the government (i.e. Putin's grip on power) to collapse (because nukes). That seems to be the main thing

The US seems to want Russia to lose the war but not for the government (i.e. Putin's grip on power) to collapse (because nukes). That seems to be the main thing driving this 'helping but not too much' strategy, but it's not obvious that it will or can succeed.