Why Russia on the back foot in 'Battle of Kharkiv'?

On the fifth day of the Russian invasion, Ukraine claimed that the Kharkiv is now under its control again. Dozens of people were killed in rocket strikes by Russian forces on the Ukrainian city of Kharkiv on Monday morning, Ukrainian Interior Ministry Adviser Anton Herashchenko said. In this episode of Khabardar, we will try to understand why Russia is on the back foot in 'Battle of Kharkiv'?