how can i get better at the game?

Hey! Learning the game and especially maps can take some time. Assuming you're playing ground battles, I recommend using your binoculars (default key: "B") to look around the area for tanks coming. Get into a position to do this, flank and have patience.

It's a learning curve and we all experienced it, so don't feel too disheartened if it continues to happen. With experience you'll become better.