Hi horsey, I was going to pm you this as I realise how emotive the subject is and I didn't want to offend anyone on here if they hold different views to myself. PM failed though (I think) so am posting here anyway.
Just to let you know you are not the only one to go through what you are going through. In fact from speaking to many of my mum friends it is pretty common.
I understand how you feel. Had exactly the same with DS1 - v traumatic delivery (with forceps that fractured his skull then EMCS). He was also a v big baby. Milk took ages to come in and when it did there never seemed to be enough for him and he'd be bobbing his head away from my breast in frustration and screaming. It was devastating and made me feel truly shit - I think I may have had mild postnatal depression from it.
Being told everyone can do it, and I am a) doing it wrong or b) just need to be patient didn't help.
What helped me was being given 'permission' by my dr, DH and midwife to top up with formula and being told that the most important thing was that he was being fed. Yep, we all know that it is the 'best' food for baby, but I really think as parents we should aim for good enough. Good enough is good enough and if giving formula may help preserve some of our mental health that will be better for baby in the end.
It can be very upsetting to not be able to breastfeeding but honestly, as your child grows you realise that there is so much more to parenting than what milk they drink in the first few weeks and months.
I hope what I've written helps in some way, I just wanted to let you know that breastfeeding is bloody hard and doesn't always work - it is not your fault or your babies. If you choose not to do it in the end, you are most definitely not a failure, you are making the right decision for you.
Rowing xx