Most democratic societies dilute and aggregate voting power in ways that misrepresent voter intention and thus make it unable to reject authoritarian tendencies

Most democratic societies dilute and aggregate voting power in ways that misrepresent voter intention and thus make it unable to reject authoritarian tendencies. In most countries, people don't vote for issues or policies, but for parties. Specifically, what democratic measures exist to act against ICE targeting people of color who are legal residents otherwise?