Chipmonkey, what a fascinating story!
Well the first CS for breech is common place now because of a flawed study on breech births which said it was unsafe to birth vaginally. We know it's flawed now but unfortunately the skill in breech birth has been lost and there are few mw such as Mary Cronk who are willing to attend a breech birth.
Your fist VBAC attempt sounds appallingly mismanaged and unsupported. You should not have been forced in the shower if it was not what you wanted. Yes, a nice warm shower hitting the small of your back sounds bliss and can be such bliss, but if it was important to you to use TENS that wish should have been respected. So, why did they place a Foetal Scalp electrode on baby? Did they have to rupture your membranes to do it or were they already broken? If so, were they mecomium stained?
Yes, syntocinon or any form of chemical induction is not recommended for VBAC. It can put too great a strain on the scarred uterus. You're lucky that the small window you had did not unzip all the way whilst you were waiting for theatre!
Try not to worry too much about not questioning things, if only I knew then what I know now I would not have had a CS and then a VBAC with forceps, which means I would not be the person I am today. And I would certainly not have met the many wonderful women I have now as friends because of my VBAC journey and training to be a Doula.
You can tell others of your experience, of your learning and reading since and your DIL will have a MIL who can inspire and encourage them to birth normally. Silver lining?