Who is right? Does it even matter?
What does matter is the misunderstanding. The lack of clear concise communication. Maybe confirmation prior to the meeting could have prevented this mishap. Prior confirmation can be critically important to prevent potential miscommunication.
Have you ever considered that employee retention just might be a death trap to the growth of your business? Are you holding on to people that should have been terminated long ago? Business, just like life changes every day and hopefully your goal is to grow your business. Things change.
Stop trying. Knock it off. Who ever told you or where did you learn that your job can give you some type of satisfaction? If you do have job satisfaction then good for you. However if you do not have job satisfaction, then so what? Learn to find satisfaction elsewhere! Find it in a hobby, a loved one, a child, a pet, volunteer, etc. Unless your job is a complete nightmare then do what you have to do to earn a living, and do it well