You are compensated for a few things in a job: The expertise you bring, the responsibility you take, and the stress the job poses on you. It seems to me that you need a significant salary bump. Not double but x10. It's not your responsibility to satisfy the requirements, neither you should take stress for it. Of course, you don't have the expertise to do it, but that's not your fault.
Given that the odds of getting a x10 salary are nil, I suggest you put all your efforts on job hunting. Answer all emails/calls with Okay now. Don't worry about the consequences of getting fired because that's the outcome you are hoping for.
Given that the odds of getting a x10 salary are nil, I suggest you put all your efforts on job hunting. Answer all emails/calls with Okay now. Don't worry about the consequences of getting fired because that's the outcome you are hoping for.