need help with my 4-1-2-1-2 narrow diamond

Hi guys,

In the last couple of days I lost multiple very important matches against much weaker teams. It is really frustrating since I lost the semi finals of the cl. Furthermore, I lost 2 competition games which means I can forget winning the league as well.

I'm using the 41212 narrow diamond formation with an motivated amc. My orders are attacking, Through the middle, own half, Normal, short, zonal and no counter nor offside trap.

My team has an average of 22.6 in the second level (4 stars).

Could somebody please advice me on my tactics? As I said I started the season great but in the last couple of days I am on a losing streak against different formations against teams Who are on average 5 points weaker.

Thank you very much in advance!