Good game, needs improvement – Soccer Manager 2020 Review

I’m in my second season managing Liverpool, we’re top of the league. But my players, especially the midfield, have continued with a 6 or lower form/ match. I also keep receiving inordinate amount of yellow cards that it gets frustrating. I’ve pushed my two forwards, Felix and Mbappe hard, and while Mbappe has delivered consistently, Felix has struggled. Where can I go to understand why my players have bad form? Thanks! Good game! I’d like to have an option to create a custom team and have it reach compete with other teams.
Review by Arturgon on Soccer Manager 2020.