This isn't a shock performance or result so far, imo. The mistakes that we're making are the same mistakes that we've been making over the season. Sloppy passing, too slow to move the ball, lack of width, lack of players making runs, giving the ball away too much, etc.
We had decent/good control in that opening 10 mins and it was a promising start. We've lost that control since and even when we do have the ball, we keep making basic errors when transferring from midfield to attack.
It's only 1-0, but at the moment we need to move the ball better and create better chances. We're just making it so easy for them. The lack of movement means that their back four only have to hold their line because they know we can't get around or behind them.