Remember that the B-36 was designed to fly from the continental U.S.A. to bomb Germany and Japan. It was the WW2 follow on for the B-29. At the time of its original design and ordering, it flying against jet fighters and crude surface to air missiles was not considered.
Yes. But it was ridiculously obsolete long before it was built. An insane waste of money and resources. Not one B36 would have made it across USSR borders. The MIG-15s would have slaughtered them.