It’s better to think of GPA and test scores as a hurdle, and once your score is high enough you are fine. Yes, you will be competing against other Asian American for spots, but it will be the ECs and essays that make the difference. Stop worrying about your GPA and start on your essays. I would write the “why Dartmouth?” one first to help you understand what you are looking for in a college.
btw, every HS has a school profile sheet they send with your applications. Google your HS name and school profile and see if you can find the one for your HS. It should have average UW and W GPA.