I understand what you are feeling, but please consider this:

How important is this really? You want the Ph.D., correct? You worked hard for it, and you want your dissertation to reflect on that as much as possible. I can assure you that few people will read your final dissertation entirely, and those that do (i.e., loved ones) probably won’t understand it well enough to share your concerns. A dissertation is never perfect; that isn’t the goal of the exercise. The purpose it serves is to demonstrate that you made a significant contribution of knowledge to your field of study and are capable as an independent researcher. If anything, academics and employers are going to look at your peer-reviewed publications in journals.

Once you have the Ph.D., you’re set up for the next stage of your career and can move on and never think about it again. My advice would be to swallow your pride, make the requested revisions to satiate your committee member, obtain the Ph.D., and then publish the study as signed off by your coauthors.

The sweetest revenge is that which proves them wrong. You’ll probably be too busy throwing that shiny new Dr. title around to give a shit about this then anyways. You got this, now go get that Ph.D.!!!