Not everyone does think they should be doing better, because xbox tells them something else apparently. I might be being over generous but I am loathed to criticise a Brighton midfield that has played almost every side off the park in the top flight of English football, including clubs like Spurs and Man United. We have a limited budget, the defence is doing OK, the midfield has been superb, and he has changed the keeper (albeit a few months late). It's harsh to blame the midfield, really very harsh. They keep creating the chances for the forwards, who just don't score. It might be the difference between Championship keepers and Premier league keepers that Maupay is up against.
But how much further up the table would we be if the midfielders mentioned had scored the sitters they've missed over the season. Off the top of my head think Lallana v Palace, Macallister v Villa (I think), Trossard v Utd and others, Ali J v Sheff Utd - all golden chances and I'm sure there are loads more. Almost certainly that then eases the pressure and the strikers will score more too. Again, I don't think anyone is letting the strikers off the hook - you are right that they are the ones who are primarily paid to score the goals.