Re: Do you have any idea how to counter 3-5-2 please?
Yep you're damn right. In both cases, the main weaknesses are the gaps ahead of the fullbacks and, to a lesser degree, the space ahead of the central midfielders. Though i think that a 4-2-3-1 formation, if faced with an aggressive opponent such as a 4-3-3 which is able to keep the opponents in their own half, is more likely to collapse. One can also say that in a 4-3-3 the wing backs have more room to run into because there are two wingers up front and not two wide midfielders. However you can also say that a switch to the 4-3-3 means one less defensive player in comparison to the 4-2-3-1, leaving your backline exposed if the opposing team is quick on the break and transition quickly before the two central midfielders can transition back to defense. That being said, probably a 4-2-3-1 that which employ a counter-attacking strategy and play a deep defensive line could work even against 4-3-3 wingers.