DD1 was the same. She didn't have tounge tie, lip tie or anything like that. I took her to chiro and I noticed a slight improvement but I don't know if it was from chiro or just time passing by.
Midwives, Health Nurse and two LC's told me that both myself and DD1 were doing it right. It was so frustrating because even though everything appeared to look correct it was still blardy painful! I dreaded feeds and was in tears daily.
It took 10 weeks for breastfeeding to stop hurting. I really think it was just that it took that long for her mouth to grow that bit bigger. We got to 17 months after things settled down and I'm so glad we persevered
Hang in there, keep trying different positions to avoid bub rubbing on the same part of your nipple. Air dry the sores, preferably under a heat lamp in your bathroom or a hair dryer on warm (best advice I've ever received, they felt so much better after trying that).
Hang in there, you're doing a great job. It will get easier. Promise!