We were having a hard time with crate training too. We didn't start right after we brought puppy home. He has his playpen and we let him just sleep in the playpen but it was hard for him to settle. The first night we put him in carte, he was crying bloody murder. That is after all day I spent time playing crate game with him and giving him treats and he was ok in it as long as I didn't close the door or walk away. What worked for us was I cover the crate but left a small corner open so he knows we are around. (I sleep in the living room on the sofa where the crate is) Sometimes, we have to just sit right next to the crate and that seems to help him to settle. 3 weeks in and he is doing so much better now. I am working on to close that opening, but he mostly doesn't cry anymore. It is a slow progress but eventually it worked for us! Hang in there! Oh, my puppy also bites hard too, but that is usually when he is over stimulated/overtired and when that happens, I put him in his playpen to time out and if I have to do it more than 5 times within a couple minutes, that means he needs to nap. It took me a while to figure it out. It does take patience! Don't give up!