Well, here is the good news
I am a specialist in separation anxiety training and a Certified Separation Anxiety Pro. I have also been in your shoes. My dog Balto use to drag his crate across the floor whenever we left. Today he is calm and has no problem when we leave and gladly goes to his crate.
Before becoming a dog trainer, I worked a lot training people and now combine my people training and dog training to help owners who have dogs that suffer from Separation Anxiety.
I look forward to speaking with you soon.