+ you may consider "outer" assistance, search for professionals ready to help with your research.

First of all don't give up. Second, you will have to sacrifice something I guess. By the way did you ever tried to get additional assistance on your academic studies, I mean professionals who would help you?

Less maths? Is there anything interesting for you in this field, say, IPv6, 5G or NGN networks, optic fiber technologies? Based on that it would be easier to give an advice)

Did you consider work in neighbor city\state? It often helps.

Anybody hired live proofreader\editor for such purposes?

At least its not too late for you. I heard about situations when some students got frustrated after 1 or more years of their study - that was really the waste of time.