As I said, the DB's mission is profit. That is what they make a big fuss about every year, and according to all news reports since making it a company that is what their CEO is meant to look after first of all even if it means worse service. You can see that in the discussion of preceding years that maintenance was neglected and too much "optimization" (e.g. work force size) was done so that they now frequently run into problems. It's all been discussed in German media for years.