He's not suggesting that the system is fine. He is claiming that the whole structure is functioning well because he's the one supervising it. Which is actually what his most ardent supporters have been claiming for some time now, it's not something new.
The attack on LvG and Mourinho was in the same vein and, of course, premeditated. They spent more than half a billion Euros for short-term success that didn't come (in the sense of winning major trophies), so his plan is better even if the results seem worse in its early stages because he plans for the future and has the club's best interests at heart.
The problem with all this is that, with a 34% win rate, he's basically asking for the fans to show blind faith in him. And that's when the lines between "trusting an insider during our hard times" and sheer nepotism get blurred.
Where things get confusing, imho, is when his idealism meets Woodward's reluctance after the LvG and Mou debacles. He spent 80 million Maguire and he wants another 100+ for Sancho, 60 more for Longstaff, close to 80 for Bruno and so on. And by reiterating in public every other day that he's after the right players and only them, the only thing he achieves is making said players even more expensive. In the meantime, because he didn't get his preferred #10 he's more than willing to accept contract renewals for Pereira, Mata and (soon to follow) Lingard because you must have a squad, after all. Which goes along with Woodward's "protect the assets" policy just fine. It also helps Ed to go after only a couple of signings each season without the risk of bloating the squad. If you think about it, they are the perfect match for each other.
Meanwhile, the great Manchester United are on route to finishing their season on 45 points... People are crying out for a DoF to help Solskjaer. I'd say we need a DoF to save us from Solskjaer's rigid thinking. People are complaining about the injuries and the lack of options when the most criminal decision, the one that has led us to this, is that both the manager and the CEO found it acceptable, for different reasons, to go into the season with such a poor squad. It reminds me of the time when Ed went to Moyes to tell him that Kroos is willing to come here and dithering Dave was pondering whether the German would fit in his masterplan... Someone (DoF) should have stepped up and say: "You wanted Fabregas but couldn't get him and you have fecking Cleverley and Fellaini for that role. Get one of the best passers in the world in his mid-20s and find a freaking way to fit him in your plans".
Solskjaer, now that the results are awful, is attaching the need for a rebuild to himself and it looks like he backs Woodward and the current regime. Woodward doesn't want a major overhaul because he doesn't really trust any manager to do it and he hides behind the need for a long-term rebuild. Sadly, none of them has the answers and the club will continue to be in disarray unless something miraculous happens.