Okay. It's not good enough, so it won't last. Because.....it doesn't look good to you? And 6 wins out of 7 is just because......what, luck? Coincidence?
I'm not saying Michael Carrick is the second coming, or even that he should be hired permanently. But no one, including you, actually know how sustainable this record is going to turn out to be.
And it is blindingly obvious that no one gets a 6-1-0 record in the Premier League, including wins against the best two teams in the league, for any other reason than that your performances have, on the whole, been good. Declining lately yes, but again, no one knows if that is a trend that is going to continue, or if it will reverse. You can see problems, they might be solved or they might not.
In short, you're jumping to conclusions you are in no position to make, and not making a serious argument here.