Okay so I just played a league match against a team with formation like that.

I used 3N-1-5-1 normal mentality / mixed passing focusing both wingers / normal tackling / zonal marking / own half pressure.

My team is even higher skill level than his, 15.6 vs 14.2.

I pressured the whole game ~80/20 (due to his being an illegal formation?).

Is this game just so random or did I do something wrong here?