Aloha Gregor,
We are so sorry that your experience didnot meet your expectations. "Small Tour Group"; is relate to the number of people we put on our vehicles, and as you mentioned above, you did have that experience with Riley, since our vans capacity are maximun 11 people.
Pearl Harbor is the most visit place on Oahu, over 6,000 people visit the USS Arizona Memorial daily, and the operation at visitor center is totally manage by The National Park Service, so we followed the rules, that allowed us to operated there, and create an experiencing that facilitated your experience, by reserve and getting the tickets to the boat ride to USS Arizona, giving you the history behind the Pearl Harbor attack, giving you directions on how to navigate the site, however, we can not control the part that is manage by the federal government, however we will be happy to convey to the Park Service your complains.
With warm aloha,