I haven't read all the posts (just yours OP) so apologies in advance as I will probably repeat things others have said!
I breastfed my son until shortly after his second birthday, and I'm very glad that I did. It was difficult to begin with because he had tongue tie, but I got the right support to resolve it (went to a few local breastfeeding drop-ins and was lucky to get it diagnosed, then paid privately to get it divided ASAP - got an NHS referral but didn't want to wait or travel). After the tongue tie was divided, breastfeeding became very easy and a lovely bonding experience. Personally I liked the convenience of breastfeeding and found it easier than having to buy, prepare and transport bottles of formula. Of course it meant that I was the only one who could feed him but my DH took the lead on nappy changing and housework so I think I got the better deal
I did express a bit so that DH could give baby an occasional bottle.
It turned out that DS had silent reflux caused by CMPA - but his symptoms were mild while I was exclusively breastfeeding; they only became obvious when I went back to work and we started to mix feed (he had some formula at nursery when the expressed breast milk ran out). I went dairy-free and we gave hypoallergenic formula when needed, GP agreed to prescribe it luckily, maybe because we only needed small amounts.
If I hadn't breastfed and had given formula from day one, I think the CMPA and reflux would have been more severe and more obvious... so it was probably a good thing that I breastfed although I think CMPA and reflux are challenging however you feed!
Lastly, DS was a bad sleeper which was at least in part down to the CMPA/reflux, but once that was under control (when he was about 10 months old), we did sleep training and i stopped breastfeeding at night. That was a lifesaver tbh because I was so sleep deprived and had begun to really resent breastfeeding at night. It allowed me to continue breastfeeding at other times (morning, daytime and bedtime) without feeling resentful.
So I guess if I have any advice it would be that even if you choose to breastfeed, you don't have to do it exclusively (ie you can express and/or give some formula) and you don't have to breastfeed on demand 24/7 for an indefinite length of time... it's good to BF on demand in the early days when establishing supply but you don't have to breastfeed through the night until your child self-weans if you don't want to!
And I'm sure others have said this but just make sure you know the breastfeeding helplines, local drop-ins and support groups (if they're running F2F atm??) and reach out for help if you need it, the early days can be tough but worth it if you persevere.