My experience is this
1st baby, a son, born October 10lbs. BF exclusively from birth to 7 months.
Did not have a great experience. An hour on an hour off, cracked bleeding nipples where he would throw it up and we would have to start again, nipple shields, mastitis (with miserable flu symptoms) listened too much to others who insisted I should persevere. Felt very alone. Actually got a bit better towards the end when we introduced mixed feeding. Robust child.
2nd baby, a daughter, born October 9lbs ( a year later, yeah, I know !) BF for 2 weeks, not as hard as the first, but after 2 weeks, few wet nappies and losing weight, went onto bottle, as was her older brother, no bother.
3rd baby, a daughter, born at 41 weeks, 10lbs, a week and that was enough.
4th baby, a son, born at 36 weeks, still 9lbs !, BF in the hospital for 24 hours then straight onto the bottle, strongest of them all from a health pov.
So, my conclusion from experience is, unless you are an absolute natural with these things and it feels easy, go on the bottle. It seems to make zero difference to their health, but it makes a massive difference to your well-being if someone else (like your partner or mum and dad) can feed your baby a bottle while you get something to eat, or care for other children. I was properly ill with the mastitus and felt terrible at times because I was effectively chained to him 24 hours a day, and I probably would not have co slept had I been able to avoid it, but an hour on and an hour off means you end up doing so because you are so knackered. My daughter is pregnant now, and I have said to her "give it a go" but if it doesn't work for you, don't feel bad for even a moment about the bottle. There's too much pressure going around about this stuff. Sorry, I have rambled, but I hope this helps xx