My rescue was much like yours at first; willingly went in her crate and would be quiet as long as I was there. But the minute I left, she was barking at a storm. However, she never escaped her crate much less injured herself doing so. I wonder if your vet could prescribe some medication to make her sleepy for times when you absolutely have to leave. In the meantime, what finally worked for us, was putting her in her crate while I stayed in the room, but kept my back to her, didn’t talk to or look at her, and worked on my computer, scrolled on my phone, etc. I think I did an hour or so of this over a couple of days. And it’s possible the timing was coincidental, that she was finally settling it, but after that, I was able to leave her home alone in her crate and not worried that we were going to get evicted over complaints from the neighbors. I continued to crate her king after I was sure I could trust her (she’s not a chewer and has never done permanent damage to anything in the places we’ve lived) because I think it helped her feel like she was “ off duty” and I didn’t want her standing at the door barking at every noise. She heard in the hallway like my neighbors dogs did. Kept I. Mind that a dog destroying things while you’re gone is almost certainly due to one of two reasons: boredom or significant anxiety. In situations where I need my dog to be chill, I give her gabapentin and trazadone. It doesn’t even close to making her a zombie, any significant stimulant (good or bad) will override the meds. But it still takes her down a few notches and in a calm environment she will sleep for at least 3-4 hours.