What do you do if your baby doesn’t stop crying?

Please no judgement but I’m honestly thinking about trying a sleep training method with our son because as a family we are all suffering, including him because he’s getting worse not better. However he just cry’s even when you go in to pick him up and comfort him. To make him stop crying you have to fully come out of the bed room so he sees a different environment to make him snap out of it. I then sing to him or do some shushing and he will fall back to sleep until I try to lay him back down. Basically in a nut shell unless me or my husband is holding him, he won’t go back to sleep and he won’t stop the crying unless totally distracted from the situation and then I’m able to start the bed time process again. Until then he will just continue to get hysterical. I can’t see how even with control crying this would work as he’s so strong willed and doesn’t ever stop?🤷🏼‍♀️ Last night the only way we got him to sleep was pure exhaustion and he passed out on our bed with the tv on. I’ve tried a later bed time, I’ve tried not having a bed time. I’ve tried talking to him, I’ve tried keeping quiet as to not stimulate or encourage him, we’ve got the white noise, black out blinds, nightlight in case he didn’t like the darkness. I’ve tried having a fix structure and I’ve tried no structure and just go with the flow. I’ve tried less naps, more naps. More cuddles, less cuddles. Everything always results in him having this false start where he drifts off to sleep but 5 mins later WW3 begins. Sorry my question is has anyone else been in the same boat? Also if you did try sleep train which method did you end up using? As I’m at a loss of any of them would work for us. But I can’t keep on having no plan as it’s not working for us.