Lampard got a load of stick when they were conceding goals for fun, now he's getting praise for fixing it.. It's not rocket science, it's just a case of signing better players who don't make multiple dumb errors every game
I think the role of the modern manager is just that.. managing players. Creating the right atmosphere, broad game plan etc.. the biggest impact they have is team selection and having a hunch on who to bring on, and when.. in order to turn a game. Most of the game is down to the players, being switched on mentally, getting an understanding and chemistry together etc.. If they take the responsibility and have a bit of pride about themselves, any manager is going to look good.
Solskjaer gets grief, but i'm not really sure what he can do at this point. That Europa League game was shocking how bad it was, but i'm pretty sure the shocking defending wasn't his game plan. The problem he has is that the players hold the power and if they keep switching off and not holding themselves accountable, it's going to be the manager who gets the chop.