Aloha, my DS was going that way. we thought he hated his cot for a while as he would scream and get hysterical everytime we put him in it. Now if its time for him to go to bed in the evening and he is being a nightmare, standing up and screaming, then I cuddle him, calm him and lay him down (sometimes he struggles too much so I just lay him down again), then before he gets hysterical again just keep laying him down again and again and again, stroke his back, hold his hands say 'shhh' to him, when he starts to calm down everytime he tries to get up I push his head down and hold him down gently, I may have to pick him up and cuddle him again but eventually he calms down enough to go to sleep.
The daytime he has to be really dropping off before he goes in his cot, he gets through the overtired hyperactive stage, starts to grizzle a bit then I pick him up and cuddle him or give him milk (sometimes reading a book with him even works) to calm him before putting him into bed. It only works if he is really overtired and I can find a way to calm him down. But it is improving, he is finding his own routine now.
I guess you've tried everything, but maybe find something helpful. If you keep persisting with something will work. I was talking to an 'experienced' mum, pregnant with her 4th this morning and she says the only thing that has worked with her children is controlled crying - if you are tough enough!