Hmmm, swaddling was my first thought. Also try using the "second neck" hold.
I don't know enough about your situation with low supply, but yes, it does sound like frustration on his part. If you're working with your IBCLC, you probably just need to keep working it, but I really feel for your frustration. I had forgotten how crazed my son acted at the breats when I was struggling with low supply, but it will get better as you increase the milk your baby's getting. It's so hard, but also so worth it. HTH.
|Do this by gently placing your hand behind your baby's ears and neck with your thumb and index finger behind each ear. Your baby's neck rests in the web between the thumb, index finger and palm of your hand, forming a "second neck" for baby. The palm of your hand is placed between his shoulder blades.|