What is wrong with this game?

I'm managing Notts county. Got them promoted season after season and currently in the premier League. Since getting promoted to the Prem I can't go a single game without conceding 4 or 5 goals every game, regardless of the opposition. I do also seem to score plenty of goals too, putting 7 goals past Ederson and losing 9-7 to Man City. Is there something I can change in the settings to help with this? Im playing on legendary, simulation sliders.