No sucess, although I have one of the best teams in the league

[Cat Harrison]

yes. that would be fine.

[Siddharth Shanker Singh]

My formation is 2-3-2-1-2
Keeper
CD CD
Wingback Def.Mid Wingback
CM CM
AM
Striker Striker

Is that illegal?

And thx a lot for your help, really!

Yeah bro that's illegal...You got to have 3 defenders in any of these positions DC DL DR...You also got to have 1 striker 1 goal keeper and 1 player on wing position on either of the side...When a formation is illegal then the opposite team automatically get 80 % ball possession...