How do you get anything done with a baby?

Following this thread! We are going through the exact same thing.

Try doing it on your chest while you're lying down! My baby tolerated that way better than on the floor. Or roll up a towel and put it under their armpits for support.

Have you tried gripe water or gas drops? They were a lifesaver for us. Also, look into paced bottle feeding techniques, it can help them swallow less air.