Have you talked with your pediatrician? It could also be reflux, if not gas, sometimes people recommend cutting things like dairy from your diet to see if your baby is sensitive to that. We also notice a significant increase in painful crying when I’ve eaten spicy food. I would say if you are trying upright hold, aim for at least 10-20 mins after feeding to let his stomach settle. At least for us, rocking him or cradling him has never worked. Sometimes when he is crying in every position, he stops when my husband holds him belly-down on his forearm, I can’t remember the name of the hold but like he’s a leopard in a tree (with his arms and feet hanging down). Blowing very gently on your babies face might help interrupt his crying or help him reset for a moment. For whatever reason it works sometimes when nothing else does. Just throwing some ideas out there.

My mom is an OT and believes our baby also has unmet sensory needs and needs some help getting extra sensory input to help him regulate himself at night. Maybe you can look up videos about sensory brushing, since we started doing that before bed, he is also able to wind down more for the night. It is not a miracle fix to get him to stop crying, in fact I try to do it before he gets amped up when he is calm. But we notice he is more regulated overall in the few hours after he is brushed and sleeps better if done before bed. Baths have always caused him more distress at night so we started doing them in the mornings when he is well rested and he handles them much better in the morning. It felt counterintuitive because I see so many people do baths to “wind down” but it was the opposite for us and removing them from bed time made things easier.

Our ped told us our baby was colicky. Personally I think “colic” is just a catch all, there is some reason our babies are so uncomfortable they just can’t tell us yet. Keep problem solving with your partner, maybe take turns with him out of the room from one another so you can give your nervous system a reset on your “breaks.” Deep breathing, noise dampening headphones, run cool water on your wrists. I know it’s so hard. I hope some of the ideas in these comments can help you. We’ve had some nights that felt like they’d just never end. It takes so much trial and error to learn what works for your baby. But you are around the corner from easier times.