I think the early goal by Wirts set the tone, and the well-deserved red card at the end of the 1st half was a nail in the coffin for Scotland.
I expected Scotland to do a little better. In the past, they proved they were capable of playing at a high level, but they got completely neutralised yesterday. But at least they managed to sore a goal, despite having zero shots on target.
It seems that the strategy played by Scotland is not working well. In the early minutes of the match, Scotland tended to play defensive football but they didn't really play aggressively or apply tight pressure on their opponents and this is what gave Germany a lot of space to build attacks. As a result, Germany managed to score 2 goals even though the match was still running for 20 minutes. After those 2 goals, Scotland looked very depressed and didn't seem to know what they should do to break the pressure from the Germans.
This big win was a very good start for Germany and will certainly increase their motivation, it's just that they shouldn't get too carried away or they shouldn't be too complacent too early because that could actually end up being a boomerang and it might catch them off guard.