The manager enjoys a groundswell of support when things are going well and must therefore expect critisism when the opposite occurs.
It's a sport like any other and the same metrics apply concerning winning and losing. I don't understand why so many of us get so embroiled in the detail. It's not our place. We're fans with an opinion, which counts for very little with the players or managers.
You don't need to have an encyclopedic knowledge of the game to see what's unravelling.
Last season we were more stable at the back. Without those same players, we're far more weak and vulnerable.