The lack of goals is more than simply a striker problem. Imo, the main issue is that our wide forwards are glory-hogs who only want to cut in and shoot. For them crossing is secondary and only something that they do once the attempt to shoot has failed. This usually results in a last ditch, often poor cross, and/or a defence that has had time to settle into position, ready to intercept. Also, if you are a striker for Man Utd at the moment the UNPREDICTIBILITY of the service is a major problem. For example, a Man City striker knows the majority of the time where the likes of Grealish, Doku, and Bernardo are going to be putting the ball. So if you are Haaland you keep making that run over and over and you get lots of goals. Remember the ball that Anthony put in yesterday with his right foot that Hojlund was a few yards behind? That was probably as big a surprise to Hojlund as it was to the West Ham defence and that surprise and hesitation meant he wasn't on the end of it. At this point, Hojlund is probably questioning himself and not making the runs he's been taught since the ball never arrives. Bottom line: if you KNOW the ball is coming you make that run.
It sounds stupid, and maybe it is unworkable, but Ten Hag needs to ban these guys from cutting in and shooting. If they do it then it either goes in the net or they spend the next 5 games on the bench. What is left to lose? Second lowest scorers in the league and it's Christmas.