Let's talk about Sleeping through the night

or there lack of. Finley was a horrible sleeper as an infant. Horrible I tell you. I thought at around 4 months she was almost there, waking up only 2x a night. Then we moved to Alaska, and she was up ALL THE TIME. About 4 times a night. Around a year old we started letting her CIO and that worked okay, it took a bit to get used to. But worked.
Well Ezra is just as horrible at sleeping if not worse. At least with Finley I was able to rock her to sleep, she took a pacifier and that soothed her. Ezra will not take a pacifier, will not be rocked to sleep, will not take a bottle. So it's all up to me, to be up with him all night long, all he wants is the boob. Thats it! Not even to eat really, just to soothe. This is the point where I wish he took a paci. I was happy he wouldn't take one at first because it's hell to get rid of...hell! But this is hell too. I'm up at least 4-6x a night. NO JOKE! We recently started trying to cio with him. I hate it, it breaks my heart. I get horrible anxiety and I just want to go outside or put a pillow over my head until he stops crying, thats how bad it is. He doesn't cry for long, but it's just sad. He was actually starting to do better and better with it, but now it's getting worse again. He will cry in the middle of the night these loud shreaking crys and he will not stop, will not cry himself back to sleep. And it's getting more and more frequent, like every hour and half I'm up with him. I'm at my wits end and I'm exhausted. I honestly just don't get it, why will he not sleep? WHY? What am I doing wrong that makes him feel he needs to be up so often, why do sleep routines an sleep training work for other babies and not mine?
Now hubs isn't much help, but thats because the man works his ass off at work. He has been working from 2:30 in the afternoon till 6:30 in the morning. So we are both exhausted and at a loss of what to do!
So if any of you have any tips, or have went through this some input would be greatly appreciated.