I wouldn't worry too much about that. Most of us have pretty thick skins.
Not everybody, of course, but Taiwan does have an export-oriented economy, and English, for better or worse, is the language of international business. Taiwan is also stuck in a rather nasty middle income trap at the moment, and the only real way out is moving up the value chain and improved branding in international markets, which will require better English communication skills. And Taiwan's continued existence as a country relies on the good graces of its allies and friends, especially the U.S., which, as you know, speaks English (sort of).
Maybe in the U.S., but not in Taiwan.
That sucks, but you'll probably soon find that people in Taiwan won't exactly treat you as one of their own either, which also sucks. At some point, you just have to develop a thick skin and get on with your life. Of course, where you end up feeling most comfortable is a personal choice.
If your parents are Taiwanese, you should be eligible for ROC citizenship. It may require a little military service, but that's a job too, right? I'd say your main strength now is your bilingual fluency. It's not a job skill per se, but if you're here for the long term and willing to work hard you will be able to find work.