Comment by physcab

I was a Physics undergrad+ Physics / Materials Science PhD and I ended up just quitting 4 years into my PhD. You can do it too. You don't owe your advisor anything and you've definitely put in your indentured servitude. I ended up getting a job as a data analyst / scientist and never looked back. You can work on interesting problems, use the same experimental design knowledge and methods, and get paid $100k more than a grad student.