They obviously need it:

Ukraine cannot protect all of its main cities from Russian missile threats without a significant increase in the provision of air defence systems, according to a key adviser to President Volodymyr Zelenskiy.

Mykhailo Podolyak said the strikes on Odesa over the past week had shown clearly that the Russian strategy was to bombard Ukrainian cities, with the aim of overwhelming air defence systems.

“Russia’s tactics are clear: they use massive drone attacks to overload our anti-aircraft systems and then in parallel they have a window of opportunity to use ballistic missiles to target infrastructure,” he told the Guardian, in an interview at the presidential administration in Kyiv.

Honestly, there is probably not enough that can even be given over to them to make the sort of difference that is required.

This combined with the various other setbacks that the Ukraine faces, it does not make sense to not be actively pursuing a peace deal.

They should have been working on cutting their losses a long time ago, but for whatever reason, Zelenskyy thinks that NATO is fully capable of giving them the instantaneous and infinite supplies necessary to potentially win the war...

All while he runs out of manpower.

It's a mess of a situation and allowing the war to go on like this is a human rights violation.

Zelenskiy adviser calls for big increase in air defence systems for Ukraine

It makes moral and economic sense for west to help more as Kyiv cannot protect all main cities, aide says

^{Shaun Walker (The Guardian)}