Sailed on Solstice in early December 2022 on an 8-night Mexican Riviera... one of the most enjoyable cruises we've ever taken. None of the behavior you listed. Met a lot of wonderful passengers, ship was spotless, and the staff was awesome. We enjoyed it so much that we immediately booked a Bermuda cruise with a large group of friends this summer on Summit.
We sailed Celebrity a few other times pre-COVID (Sky Suite or balcony) and I agree with others who have said passenger demographics depend largely on the itinerary and time of year. Europe is always more formal and reserved, but equally enjoyable.
I'm really at a loss regarding a potential replacement cruise line suggestion for you. Viking is amazing but all passengers must be 18+. Virgin Voyages is also adults-only. We love HAL but it caters to a more mature crowd. Azamara, perhaps? We haven't tried them yet, but that seems like it might be a good fit for your family. RC just sold them off recently, though, and I haven't read anything about how they are under new ownership.
Good luck in your search!