According to a report from The New York Times, some pro-Russian commenters are angry about the military's mistakes.
President Zelenskyy said that Ukrainian forces had liberated 700 square miles since launching a counter-offensive earlier this month.
Insider can't verify the figures, and Ukraine has not allowed the media to report on the counteroffensive.
According to the NYT, the decision to retreat was made to regroup.
"It's time to punish the commanders who allowed these kinds of things," said Maksim Fomin in a video he posted on Telegram.
The New York Times reported that Putin was at the opening of a Ferris wheel in Moscow to commemorate the city's founding.
"You're throwing a billion-ruble party, what's wrong with you?" said another pro-Russian writer on Telegram. It wasn't at the time of the failure.
The last few months have seen a rise in criticism. More than 400 Russian soldiers were killed or wounded when the Russian military tried to cross the Siversky Donets river in May.
After the failure of the Siversky Donets river crossing, the warblogger with 2.1 million followers on Telegram said in a video that he had been avoiding criticism of the Russian military.
Podolyaka said that at least one battalion tactical group was burned by the Russians.
Russian lawmakers have called for President Putin to be removed from power over the war inUkraine.
Russian military failures have become well-known as the war has dragged on, and one Russian parachutist even wrote about his experiences, recalling how he was forced to shoot himself in the legs in order to be sent home.