If you think Tim Cook has always led a charmed life at the helm of Apple, think again. The years straight after the death of Steve Jobs in 2011 were a trial by fire. First there was antitrust: America’s Department of Justice (DoJ) sued Apple for conspiring to fix e-book prices. Then there was competition: Samsung, a South Korean rival, went to war with the iPhone with bigger, sleeker models. Then came broader concerns. Apple’s new voice…