How come Bavaria has the highest GPD per captiva (without counting Hamburg and Bremen which are basically cities, not regions) and the second highest total GPD in Germany [1]?

Your experiences are unfortunate and annoying - no doubt. But even if it might be more likely to happen in one region than another this could happen in other regions as well. In the end it's anecdotical stereotyping.

[1] https://en.wikipedia.org/wiki/List_of_German_states_by_GDP