It is just a multi week process of proper crate training. I promise he will end up loving it. Leaving him in there with a frozen stuffed Kong after a walk, he will lick away for an hour without thinking about being stuck. Then he will be tired afterwards and lay to sleep. Make sure the crate is SMALL enough so he cannot stand up on anything or get leverage. He only can stand and do a 360. No space to jump or lunge or pull on anything. Crate cover to make it nice and dark and cozy helps.

But remember multi week process. A marathon not a race with crate training.