My wife had a lot of difficulty with breastfeeding for the first month, and our experience with lactation specialists was mixed. Several were horrible like the ones you described. One was amazing and her primary advice was "feed your baby", formula was fine. Her other primary advice was "take care of yourself" such as using nipple shields. Not only can the nipples be sore, but too much damage can lead to more serious complications. Everything else could be fixed/improved over time. Sometimes the baby is tongue-tied, like ours, and the breastfeeding advice is unlikely to work until that is fixed. Again the lactation specialists didn't think to look for that except the amazing one.
BTW Congratulations!