Sorry to hear the bus ride had some issues. We have been on five tours but mostly city so no bus. This was our first long bus ride tour.
As I mentioned the Guide did tell people to rotate the front seat. If you are upset and want the front seat I would suggest talking to the guide first. I and my daughter get car sick. I get car sick very easily. We did not ever sit in the front seat. We sat anywhere from the second to fourth row. We took medicine every day for car sickness and wore the bands. Even though we had some winding roads I am happy to say in 14 days we never got car sick! We did not sit in the same seat everyday but the same area more or less as did the rest of our bus. My husband and son sat in the middle. Not sure who sat in the back?
I am not sure how many rows there are. Most tours have 28 people so would need to do the math. So not everyone can have their own seat. I know on our bus there were open rows. Some people sat together everyday. My daughter sat with me everyday. My husband and son sometimes sat together sometimes in their own row.
People did talk to each other on the bus and everyone was very friendly. Too bad you did not experience the same thing on your tour. I think if you are having problems go to the guide first. I am interested though when you wrote down things you did not like about the tour the guide read them out loud? We wrote down items but the guide did not read them out loud.
I think if you have an open mind and are friendly you will have a great time on a RS tour.