This game serves as a good example why a lot of Germans don't like Löw.
Once he had some success he likes to rest on it. He chose the right tactics against Portugal and was rightfully praised for this. But he obviously didn't see the flaws in that system, otherwise he wouldn't have played it against Ghana. In that game against Portugal they benefited a lot from that early penalty, which gave Germany more space than they normally would have had. Despite that, and Portugal missing one man for almost 2/3 of the match, they only managed to create about four or five chances from open play. That was due to a couple of factors. The first one of course are the very defensive fullbacks resulting in Germany very rarely applying any pressure over the wings. Höwedes is out of place as a left back. He doesn't have a left foot. He can't run behind the winger and put a cross into the box right away. Plus he lacks the speed. The way that was solved was by almost always having one of the four centre backs go forward while the other three stay behind. And while that may benefit the defense you have a lot of less options on the attack that way. Then there is the three man centre midfield. Of those three men only Kroos can be considered offensive, but only barely. While he does provide the passes, he is not known for making runs without the ball and creating space. So when Kroos has the ball, he most likely only has three options on the attack. That's too few against a team that is playing defensively and keeping 9+ men behind the ball. It was to be expected that Ghana would try to concentrate more on defending than on scoring goals. At least for the first part of the game. Still Löw decided to stick with his team from the first match, even though he probably knew that it would be very hard if Germany didn't score early.
Löw rarely admits mistakes or corrects those that he has made. The first half made it fairly obvious that the type of 4-3-3 that Germany was playing, which was focused on dominance in midfield, wouldn't work today, because Ghana deliberately gave up the midfield and concentrated on the defense. Germany was missing options on the attack. So what Löw should have done is switch to a 4-2-3-1, a system the team knows, in order to have alternatives going forward. He also had a chance to install a more offensive full back, when Boateng had to be switched out he easily could have replaced him with Lahm, who has had a hard time in central midfield so far, and switched in an attacking midfielder or Klose, if he has the power for 45 minutes. He didn't decide to change the system at all and stick with his original plan. So Germany continued to create barely anything and as it happens in football, all you need is two individual slip ups to go behind. What were they planning? For Ghana to get tired before Germany does?
To be honest, in restrosprect, I would have preferred if Germany had lost to Ghana. It would have applied bigger pressure to our coaches to not just rest on their success, which they sweared they wouldn't, but to keep up the tension and think about every match individually. Don't be afraid to face the mistakes you've made. Now the reports are mostly positive in a "Well, it can happen" kind of way. I like Löw, I sometimes just get the feeling that he needs some sense slapped into him. Still think we're gonna beat the US and go through. I trust the trainer team to have learned their lesson and not start with a 4-3-3 again if the US manages to not lose against Portugal, which will mean that they'll only need a draw and most definitely park the bus like they did against Ghana. Go Germany!