I'm referring to the more generic meaning of authoritarianism, as in imposing authoritarian measures, from Google:
au·thor·i·tar·i·an adjective favoring or enforcing strict obedience to authority, especially that of the government, at the expense of personal freedom.
Personal freedom means being able to do anything you want outside of violating other people's person or property without their consent. The idea of being free to act in any way other than violating the rights of others (though violence, theft, etc) is a pretty widely accepted principle of a free society.
That means any consumer protection law, that restricts the right for a party to offer a particular product/service, by fining or imprisoning those who do, is authoritarian.
A law against theft or murder is not authoritarian.
That's not what authoritarianism means. When society restricts some individual freedoms that's not always authoritarianism. You personally may not like it; you may be ideologically opposed to it, but that's not enough to make it authoritarian.
https://en.wikipedia.org/wiki/Authoritarianism
Otherwise, every possible society would necessarily be authoritarian for a simple reason: a society comprises more than one person. For simplicity assume there are only two. Either person A is allowed to do as they like -- including things that may restrict B's freedoms -- in which case the system is authoritarian, or there is some social mechanism in place that forbids A from behaving in this way, in which case the system is also authoritarian.