The point is you're banging on like you expect perfection every single second of every single match, analysing this, analysing that to try to get perfection. It's not going to happen.
We have a young player, never played in the Prem and he has 3 gaols and an assist in 3 matches. WTF do you want? It's football, not chess. We don't know what the opposition is going to do from match to match, you can't hope to prepare for every move, every pass, every incident. All you can do is get as many top class players in as possible, coach them as well as possible and try to get as much as you can out of them as often as you can. Do that and you have trophies in the cabinet more often than not.
You'll never get the perfect team you strive for, stop stressing over it and enjoy what we have, because it's never been any better than this and it might never be again.