How do I deal with this team?

[Stafford]

Leyssens: if your opponent has only two defenders, he is playing an illegal formation. If one is playing an illegal formation (no wingers, no attackers, no goalies, ≤2 defenders), the opponent gets 80% ball possession. You will almost definitely win the game. All you have to think about is how many goals you're going to score.

[Potemy]

Leyssens: if your opponent has only two defenders, he is playing an illegal formation. If one is playing an illegal formation (no wingers, no attackers, no goalies, ≤2 defenders), the opponent gets 80% ball possession. You will almost definitely win the game. All you have to think about is how many goals you're going to score.

Don't be so sure, there have been many threads on here about users failing to beat teams playing illegal formations.