I need help… should I give up?

I adopted a dog 5 months ago with full commitment and love. Since then, I’ve tried everything: routines, daily training, patience, and working with a professional behaviorist (remotely). The reality is that the situation is extremely hard. Ongoing behavioral issues, impulsivity, destruction, waking me up at night, and constant hypervigilance on my part. I’m exhausted, anxious, and I never feel relaxed in my own home. What hurts the most is that this is making me feel anger and rejection, and that breaks my heart because I truly love dogs. I had a dog before and it was a wonderful experience. This one is not. My honest questions are: Are there cases where returning a dog is not “giving up” but recognizing a real limit? Has anyone gone through something similar after several months? How do you tell the difference between a temporary phase and a real incompatibility? I’m not looking for judgment or easy validation. Just real experiences and honest advice. Thank you for reading.

Edit: I forgot to mention… this is a rescued dog, he has between 1 or 2 years old, and that is the reason for his behaviour problems. I wasnt advised on the rescue center about this before adopting.