Since you asked, even though it seems coming at it from bad faith then there’s many forms of non democratic decision making or even systems which get on well without making decisions that don’t fall in to oligarchy or monarchy or other forms of near ir actual authoritarianism.

Consensus, which could be seen as near democracy, but isn’t democracy since it requires all those making a decision to agree completely, not based on majority rule.

Some forms of anarchism do not really believe in democratic or oligarchic rule and don’t rely on any kind of formalised decision making.

Counter to popular belief there was a time in history before the creation of democracy which was not oligarchic or authoritarian etc (though I’m sure some may argue it was) which was based on asking elders who had knowledge and wisdom about what to do in certain situations, like harsh winters etc. It probably continues today in some form. Today and in the past it is/was usually as equally non authoritarianism based since if they stopped being trustworthy then they stopped being listened to. Sadly this is incorrectly often called ‘tribal government’.

Then there’s also just general co-operation without a formal decision making system.

Finally, for now, there’s those that will go there own way if they don’t agree with a particular decision, which is a perfectly acceptable way of doing things instead of coming to blows or pointlessly arguing it out.

Here’s some further reading and listening for you:

• https://en.wikipedia.org/wiki/Anarchism

• https://srslywrong.com/podcast/207-democratize-everything/

• https://reddit.com/r/Anarchy101/comments/17zruxr/is_anarchism_antidemocracy/

• https://theanarchistlibrary.org/library/zoe-baker-anarchism-and-democracy

• https://libcom.org/article/anarchist-critique-democracy