I think I know what's going on

[cookizzz]

I suggest you reviewing the forms of your players, replacing poor form players with backup players even if backup players' qualities are far lower, and using consistent players who are not necessarily the highest quality players or MOM. As you have already been knocked out of CL &CUp, you only have 1 official match per day, so you can use a relative consistent starting lineup. In my experience, a consistent lineup can gradually help improving performances. If low quality player have good performances, I will continue to use them. Don't change your formation too dramatically. I also consider counter formation but changes are usually limited to whether I will use a DMC instead of a MC, whether my wingers will push up or down, whether I will move my DC/DL or DC/DR to the centre, etc. My teams always have better performance in 2nd half of seasons after I use a consistent starting lineup which always include one or two players who are the lowest quality players in my whole roster.