As for agile ceremonies, some of them are needed for smooth operation of the team. Some of them are pure fluff. A good manager will know the difference and make real-time adjustments to the process to find the balance. A team of 7 doesn't need to spend more than 4 hours a week in meetings.
Back-and-forth is a result of poorly worded AC or people not reading the AC. Sometimes it can be avoided, sometimes not.
You just need to understand that in corporate jobs, you're on a team. Everyone works for a paycheck just like you, so there's a social give-and-take that must take place.