With hindsight, we see that the Soviet Union never had a chance of world domination, but we didn't know that then.
Getting bad reviews or doing something that's not great is also really good for you as an actor. It also makes me feel as an actor that I've earned my stripes a bit.
It's hard to be happy when you are facing 120 to 140 degree temperatures and nothing seems to be moving in a direction that you think or they think or you've been told it's supposed to be moving in.