Op, I'm sorry to hear you're not having the birth you have wished for, I get that that can be really disappointing.
I had an EMCS after 24 hours of no progress and ds becoming distressed - ideally I had said I'd want no more than a puff of gas and air and a water birth but was comfortable with whatever needed to happen happening (except instrumental delivery, for some reason I had a complete mental block on it, but obviously would have agreed if necessary).
I can't comment on the hormonal aspect of a c section without labour, but I can say that my birth experience was great regardless. I had a lovely team who let the midwife take photos whilst ds was being born so have a little timeline from him head and houlders out, body still in, all the way up to delivery with cord still attached and my very favourite which captures Dh and my first look at him over the sheet, our faces are wonderful.
I also healed very quickly - catheter out within 12 hours, minimal pain and was up and walking about town on day 5. I have a barely there scary and if I were to have had another child I would have opted for a section.
What I will say is, for me and many other women I know regardless of delivery method, the rush of absolute love and wonder was a myth - I loved ds and wanted to keep him safe, but my first 2 weeks post aprtum.were a panic of "am I enough for you, did I do the right thing? What have we done out lives will change forever...", then one day a couple of weeks i looked at him and realised I would fight the entire world for him. He's 8 now and our bond is so strong.
The reason for mentioning that is, sometimes, especially in those first few weeks, we aren't how we expect to be - this is normal and not necessarily related to the birth if this is what you experience too.
Otherwise though, you sound like you've done a fab job recognising you feelings and reaching out, and so I would encourage you to do that again if you feel that anything you experience after the birth isn't right - your midwives and hvs are experts in understanding and supporting women who's mental health is affected post birth.
You are allowed to be disappointed but this is the safest thing for you and your baby and it's no one's fault. However your child comes into the world, you have created a tiny human that you have kept safe and grown for the entire pregnancy and that's amazing. She will be amazing (and exasperating, and exhausting, and wonderful, and anxiety inducing as all children are!) and you are her mother. The birth is just the very first step of your next chapter together.