you need to buy 5* players first time. I use the 4-4-2 classic formation and I've lost only 1 match this season so try it with the orders:
team mentality: hard attacking
focus passing: down both flanks
pressing style: whole pitch
tackling style: normal
passing style: mixed
marking style: Man-on-Man
I olso use the force counterattacks, but i don't use the offside trap.

Try this and buy 5* stars players ok?