In contrast, the Kremlin hailed Trump's comments. Spokesman Dmitry Peskov said it "absolutely" agreed with Trump after he urged Zelenskyy to "move fast" to end the conflict.
Both sides are trying to improve their situation on the battlefield amid Trump's push for a ceasefire.
Moscow Buoyed
Moscow has been buoyed by Tuesday's talks in Saudi Arabia and Trump's attacks on Zelenskyy.
The talks "made the first step to restore work in various areas of mutual interests," Putin told journalists.
Kyiv was not invited to the Riyadh talks as Moscow and Washington moved to sideline both Ukraine and Europe.