I appreciate what you're saying Twinklestars (I also did the peer to peer support training a while back) particularly about tongue tie as I know in some areas like mine the service is woeful however;
I fed 3 babies for a few months each, the longest being my third for 8 months. Despite the tons of research I did (I like to read a lot
) and I still couldn't really say why but each experience was different.
My first I was very sore, walking around with chilled cabbage leaves in my bra, using milk collection cups, loads of fresh air, nipple shields etc
My second I will never forget the excruciating pain which felt like I was being stabbed with a knitting needle all the way through to my back during latch on, I had to grit my teeth.
My third, I NEVER had any soreness whatsoever and honestly don't think I did anything different although I did get mastitis I think around 6 weeks in and it was horrible I felt like I'd got the 'flu and apparently that's linked to being engorged and the milk leaking from the mammary glands into our bloodstream but I don't know how that happened as he literally never stopped feeding!
All that to say that, yes, latch is incredibly important but I think sometimes for some people it just hurts for a while. I was determined to continue so battled through but can see why people without support from partners and other stuff going on think forget it.
I would also say as much as I'm pro mother's milk where possible I actually gave mine the occasional bottle of formula from being tiny as I'd seen people want to stop breastfeeding and really struggle as. Baby wouldn't accept a bottle, mine would always have either and during that painful difficult bit with my first giving him a bottle restored my sanity when he just would not stop cluster feeding (and yes I know about supply and demand but as a one off it put me in a much better place emotionally and enabled me to carry on)
It IS worth it once the early weeks are out the way when you're you can just whip your boob out and feed your baby with your wonderful milk served at the perfect temperature and no washing up!
Have a family sized block of chocolate and a cuppa OP you're doing amazing 
