I don't think it's so much about knee-jerk. Any sane person would know it will take time for ETH to work his magic and get the team functioning in the way he wants them to.
The issue I have with yesterday was the same basic mistakes from the same players...McTom and Fred just so poor on the ball and positionally all over the place, Rashford's touch, decision making and lack of effort, Bruno's inability to keep the ball and create anything of worth, Dalot's horrific ability to defend and De Gea's constant mistakes.
These are issues that have plagued us for easily 18 months and yet they're still on the pitch and still doing the same things.
ETH has made one big mistake with the FDJ transfer and that may now cost us the season unless he and the board act quickly and ruthlessly in the coming three weeks and of course ETH can make al the pain go away if he gets the team playing the way we all hope he can but I've said it before, we cannot keep trying to polish turds, that are stinking up the place, they've got to be gotten rid.
I'd much rather see us try Garner, Hannibal, Garnacho, Iqbal etc be given a chance over these continued failures.