You're overreacting like fucking crazy. The difference between the people doing what you described and 'doing' something while not actually being part of your group/talking to you about it, are not any different. I agree it's more fun with 6 people all hooting and hollering and trying to do whatever, but like, you went in with random folks, as long as they weren't actively doing something negative to you your experience was not particularly impacted on that ride. It's not like a bad pilot can fucking fly you into the ocean or not go to light speed, the ride is 100% dummy proof.
The wording you said the employee gave you gives me pause, and is closer to what I've experienced at WDW in the past as well, but it's certainly not RUDE, and you're not owed another ride just because of it. It's like getting the eternal life on Indiana Jones and complaining that you didn't get infinite riches - yeah it's DIFFERENT but it's not wildly different. It's still functionally the same ride. The only person having less fun than they should've is the person not engaging with the controls, but your functions in any given seat still work properly no matter what anyone else isd oing.