Nursing question!!

My son is exclusively breastfed.. But I've been having to bottle feed him because he just isn't taking to breastfeeding... He will latch (mostly not correctly, and will flip if I try to fix it) and at least once a day I can get him to nurse... But usually he will freak out, crying so hard, and refusing to latch or nurse... He thrashes his arms and legs, and jerks his head away. I've tried switching positions, propping his head... I can't seem to get him happy enough to nurse... Any advice?? I'd really like to have him at the breast for feedings as opposed to a bottle.

Thanks in advance for any advice!