The state can violate people’s rights and it does so quite frequently. Anti-state arguments often appeal to rights arguments based on lack of consent to the social contract to delegitimize the state.
Well, I just don’t see why you believe that rights have to be enforced by the state. If I protect someone from violence, surely, I’ve protected their rights, but I’m not the state. Moral rights can fail to be enforced, and still be valid.