The Nazis found the Russians to be quite tough.
In 1945, the Nazis found them in Berlin.
“artillery, air, tanks”
The Russian artillery was probably far superior in quantity and roughly equal in terms of quality.
The Russian tanks such as the JS III were probably superior to American tanks both in quality and quantity.
The Russian aircraft were inferior to American aircraft.
Only with the MIG-15 around 1949 were the Russians able to get anywhere close to American aircraft capability.