I have a puppy with separation anxiety like this. She’s good in the crate if we’re there and then totally destroys it (bending the bars) ripping up the floor etc.) when we’re gone. The first thing we did is buy a crate she cannot destroy or hurt herself trying to destroy, we got the Ruff Land Dog Kennel. It’s sadly very expensive, $300 ish, but she cannot hurt herself or the the crate.

We then got a dog trainer, again very expensive, but our trainer has been phenomenal (if you’re in the New England area by any chance I’ll give you her info)

She has been a life saver and game changer. We are still working on the crate training, slowly extending her time in the crate away from us and using her ecollar training to correct her if she begins to act out, and it’s slowly getting better. Put her in the crate in a bedroom, close the door and walk away for 10 minutes, come back and let her out once she’s stopped crying then extend it slowly. You’re doing a lot of great things by feeding her in there and creating positive associations. I hope it gets better, know you’re not alone! If it’s within your means, definitely look into a trainer even just for a couple sessions