For almost two decades it had felt inevitable that Ronald Koeman would get the Barcelona job sometime. And now he has it, walking into the chaos left behind by Friday’s 8-2 Champions League quarterfinal defeat to Bayern Munich and signing a contract through June 2022. If narrative was the driver of success, this would be perfect: two entities that have seemed meant for each other for so long, finally brought together in a state of crisis. But the reality is that it’s far from clear whether the coach was the major problem, or whether anybody could put right what has gone wrong without a major overhaul.