How patronising,unkind and unsympathetic of you to say this. What was your intention in writing that out - did you honestly think you were being in any way helpful or contributing positively to this thread?
I don't think anyone equates childbirth to a trip to alton towers. You're right that you can't have a rigid plan for birth, but it is a good idea to list your preferences - even if you don't get the experience (and it is an experience, you actually say so yourself in the your next sentence) you want, some parts may still be possible. A birth plan also helps you to be informed on the process and possibilities end to end, it's not a guaranteed step by step - if that's what you meant then you're correct.
3 midwives in as many hours sounds unusually bad to me and childbirth often is painful, damaging and scary but it shouldn't be. We need to stop accepting poor standards around women's health care and question/challenge when something doesn't feel right. That way if practices are wrong they can be improved and if they're correct, the quality of information we share amongst parents can be improved so we are all better informed.
Your statement that antenatal classes are there as a sales pitch otherwise nobody would come back is nonsense. If that were the case, we would all discover the big bad secret after 1 and nobody would ever have a second child.
The birth partner aldo "goes through it". Sure they dont have the physical toll of delivery but from the sounds of it OP has been very involved in their wife's care and has been under some stress- birth partners/men are allowed to have feelings about childbirth too fgs. If OP was here saying "oooh I was so tired and hungry I didn't eat my lunch that day" then fair enough. That's not what is being said here at all.
@HSlant ignore comments like this one, your feelings are completely valid as the birth partner and I think it's great that you have been and still are advocating for your partner and child. The experience you all had sounds stressful and worrying - I'm very glad you're all safely out the other aide and I hope your wife recovers well.
You are absolutely entitled to ask for adebrief to understand why certain decisions were made, and to look for an explanation for any failings in procedure/care.
Good luck, I hope you both get the closure you're looking for. And congratulations on your new bundle of joy. It goes by so quickly, try and soak up every second - even the tiresome, stressful ones.