Fix – There is a solution. remove yourself from the street, or live somewhere that does not give its citizens the choice to follow halacha, and chumras, or not. Chances are that kind of place is Iran, or Saudi Arabia. If you want the benefit of any public services, the protection of the army, the subsidization of schooling and health care, or the right to vote at all levels, you need to realize that those benefits come with a proviso that you cannot dictate how others will dress if they are not in your home or your beis medresh.
There is another solution. Israel is a democratic country. So you have the right to organize, create a constituency, and try to convince, with ahavas yisroel and convincing conversations, a majority of people to accept your views on tznius and legislate it into law. No one is stopping you from doing that. Just be aware that others have the right, in a democracy, to disagree with you, and to organize to opposite effect. Truthfully, though, most people have other things at the top of their legislative (not personal – those should have Torah at the top of the list) priorities, like putting food on the table, or ensuring that schools and yeshivos and hospitals run effectively, or protecting the country. You know, small, insignificant things like those.
Oh, one last solution. look away.