Hello Eric,
we are very sorry to hear that the tour did not meet your expectations. We want to give our guests as much information as we can, but of course, we understand that not everyone is keen on historical dates. Maybe next time, try to ask our guide about things which would interest you the most, surely the guide would be happy to answer you. As to the German-speaking captain, unfortunately, we do not have any control over this as the boat company is only our supplier and what they do during the cruise is not really in our hands. Nonetheless, we are happy that despite all of this you at least found something positive about the tour :)