You should not have started the game with only 2 defenders, that is an illegal formation so possession will always be 80-20 in his favour. To be legal, you need at least 3 defenders, 1 striker, and 1 player on each side, left and right.

The most important thing is not the scoreline, but the result. If you win, you get all 3 points, though of course scoring more gives you an advantage.

I would not stick to any 1 formation, but change my formation to counter the opponent in every match. If you are going to use your formation, I would put red arrows on your MC and AMCs, and I find that own half pressure helps sometimes because you should already win possession, and your players are less tired, so they can score easily.