I’m not one of those people who think that the US is broken (I’ve seen other countries, and am thankful for being born in NA) but the third-party-doctrine is on

I’m not one of those people who think that the US is broken (I’ve seen other countries, and am thankful for being born in NA) but the third-party-doctrine is one of the few things that just baffles me. How can a precedent which is so obviously malicious be allowed to exist?