First of all try and increase moral of the players you can do this with the free boosters
Try looking at your tatics i seem to keep mine simple and it seems to be working lately
Team mentaliy - Normal
Focus passing - mixed
passing style - mixed
Force counter attacks - off
pressing stlye - low
tackling style - easy
marking style - zonal
play offside trap - off
Sounds stupid but the tatics might be the issue your having
If that doesnt work try repostioning your players
put the DR and DL half a postion above the edge of the box and the 2 DC just inside the box
put the DMC/MC into midfield so have 3 midfield 1 furthest left as possible, other to the right as possible then 1 dead in centre
Also i noticed i was having trouble with attack with AML and AMR so i pushed them down a bit so half way between mid and st and put st just outside the box
I was having the same problem as you with scoring and letting in goals and for some reason with a simple tweek i am scoring more and letting less goals in