Russia had state-of-the-art long range bombers in 1930s-earlier 1940.
Oh nonsense. Once again, you prove you just make things up and think nobody will check out your claims.
The absolute closest to that was the DB-3. And it was indeed first tested and flown in 1935. However, it did not enter service then. It required a lot of improvements first, and was a challenging aircraft to build. So the first units to enter service were not until late 1938.
However, one also has to remember that this was not a heavy bomber, it was a twin engine medium bomber. And "medium" is only in relation to the size, not the payload. They made so many sacrifices for lesser metals used in construction and maximizing the fuel capacity that the internal payload was only 1,000 pounds. With the majority of the ordinance putting it at a staggering 5,500 pounds.
Which also resulted in multiple aircraft losses as putting that much of a bomb load on the wings highly stressed them and resulted in multiple failures due to metal fatigue.
Now the B-29, that was a true heavy bomber. Four engine, with a bomb load of 20,000 pounds.
Oh, and with a range of over 5,500 miles compared to the 2,400 miles of the DB-3, the Soviet "long range bomber" fell pitifully short in that are also.
I am not even sure what you are trying to claim here, as the list of Soviet heavy bombers in WWII is rather anemic.
First the TB-3. That entered service in 1932, and it was obsolete even then. Especially as considering it was a "heavy bomber", the bomb load was only 11,000 pounds and only had a range of 1,200 miles. And it was just a 4 engine update to the long obsolete TB-1, it was actually withdrawn from service in 1939, but put back into service after Germany invaded. But in 1941 they made up ¼ of the total Soviet bomber force, so remained in service despite heavy losses. In fact, the losses were so heavy that over 75% of the inventory of over 800 aircraft were destroyed by 1943. At that point the remaining aircraft were withdrawn from bomber duties and converted into transport aircraft.
At the end of the war, the Soviet Union only had 10 operational.
The other is the Pe-8. That was to be the replacement for the TB-3, but it was underwhelming from the start. The range was decent at 2,300 miles. But with a combined internal and external bomb load of 9,800 pounds it was pitiful by the standards of WWII. And they were only able to manufacture 93 aircraft total.
And those were all of the Soviet made heavy bombers of WWII.
Meanwhile, the US B-17 which actually entered service in 1936 had a maximum bomb load of over 17,000 pounds. And the US built close to 13,000 of them by the end of the war. And Boeing submitted the first design of what would become the B-29 in 1940. With the first test flight in 1942 and full production in 1943. With over 3,700 of them built before the end of the war.