it is not about us but the opposition, they come to Wembley and sit behind the ball
I think apart from Chelsea, we should have won our Wembley games this season. We had chances to be out of sight when 1-0 up against Burnley and, whilst not as creative against Swansea, we still hit the bar and should have had a penalty, as well as a couple of other chances that on another day might have been taken. And that's whilst they had 0 shots on target themselves.
So I think, even against sides that want to come and defend, we will start getting the results soon. Just need a little bit of luck and a touch more ruthlessness. If we'd have got 1 against Swansea, we'd have got 3 or 4 imo and we should have done the same to Burnley once we got the first.