What are her approval ratings? I can't find anything recent
On the question of whether she is a good chancelor or not this survey shows that 69% of the votes favor her.
Unfortunately I don't know how reliable or how old this is.
This article http://www.spiegel.de/politik/deutschland/martin-schulz-so-unbeliebt-wie-nie-angela-merkel-verliert-an-zustimmung-a-1162138.html says she has an approval rate of 59% in august 2017. She lost ten points compared to the last survey, which conveniently fits my first source.
Gameplay > Graphics
Substance > Style
Art Direction > Realism