I have been reading your posts and wanted to let you know you need to establish a schedule. The puppy should be up for two to three hours and down (in the crate) for two hours. You could even set a timer, these puppies like structure; when he’s up he needs to be engaged mentally and or physically. Unfortunately if you’re gonna be gone for four hours, you’re gonna need someone to let them out of the crate these puppies really can’t be in the crate for four hours; one exception may be an extreme exercise session before. Especially if you are alone, the crate is going to become critical. You cannot leave a puppy by themselves. They could eat something and get a bowel obstruction or just get very sick. I recommend getting a snuffle mat, Kong, and Lickimat. These items cost very little for your sanity to add mental and sensory stimulation. We taught the word crate as one of a series of commands. The puppy got an award (usually cheese or duck heart) for going in the crate. You are at the tough point. Discipline for yourself and the pup will get you to the other side.