I truly sympathise. Hope you hang in there, and wish you all the best.

I can relate to some of this - when I post on math overflow, my questions are heckled for poor English - by French mathematicians, when the reality is that I grew up in India with English in schools from the age of 5, and completed my Ph. D in the US. The hidden condescension, emboldened by my verifiable physical presence in India (from the profile), turns the conversation _that little bit_ nastier than it should be. All the while, the responders evade the perfectly legitimate question entirely. The tone of the responses on mathoverflow, by identifiable researchers, is quite bad and has turned me off the whole thing to a large extent.