If we take everything he’s told Yuuta to be the truth at face value, none of his actions match up. What was it, millions, billions of repetitions? If that’s true then surely after all that he must have a good idea of how to manipulate Yuuta. He’d know that telling him what to do wouldn’t be effective, so he’d try a different angle to get him to do what he wanted. If he knew exactly what actions caused what results, then why doesn’t he explain his grand plan to Yuuta, so that he can follow it through successfully and save the world? They both supposedly have the same goal; why is he keeping critical information from Yuuta? And why is it that he complains about Yuuta changing the future, sometimes intervenes and stops him from changing the future, but other times he won’t do anything about it and simply complain later? It doesn’t make sense!
Unless manipulating Yuuta to ensure the successful extinction of mankind was his goal all along. Then his actions begin to make sense.