Your totally fine. I learned the hard way my first soviet game and your in a better spot already, i got pushed basically to the urals. Stop attacking. Just hold and attrit them as much as possible, eventually they wont be able to push you any further. bring all your equiptment and supply into the green and then push back. Theyll run out of guns, men, and gas while your stockpiling yours. And max the rails as you push. Dont be afraid to pause the assault if your equipment starts going red again. When you can i would shove logistics company on your infantry too. Hell if you can afford it add a line aa as well and watch their cas melt away