Yup, bottom line, that's how I see it too. And no amount of managerial change or player acquisitions will ever be a cure for it. I don't even think Pep will be able to find the answer for United's woes.
Pep's performance in manchester city could still not be judged yet as he had not bring any trophies for them yet however he had suceed in his previous club and if he really suceed in bringing trophies for manchester city then of course manchester city wont release their coach to their rival manchester united so he is not an option for united