First of all, you are using a Defensive formation 4-5-1 flat. If you want to use that formation, you need to use this strategy I will give you.

Team Mentality: Defensive
Focus Passing: Mixed (if your opponent line-up have 4 wingers DR,DL,MR/AMRand ML/AML and midfielders ) Down Both Flanks(if your opponents have only 2 fullbacks such as DR and DL or if he is using 3 DC's.
Through the middle ( if he has a defensive line of 1 DR,1 DC,1 DL wide set up. and without DMC )
Pressing Style: Own half
Tackling Style: Normal
Passing style: Long
Marking Style: Zonal

Force counterattacks: Yes
Play Offside trap: No

Arrows: No arrows on DR,DC,DC,DL Red Arrow: MR,ML. If your opponent has AMC, change 1 of your MC to DMC, if no DMC, just put Blue arrow on the center MC.

This set up is for Defensive game. It doesn't garantee wins but seeing your current set-ups, I think what i have given you has far more effectiveness on that formation.