Personally, my mother was good at writing, so she taught that subject until I was 12. After that, there was a local writing teacher who taught an equivalent of comp 1, and comp 2.

My father taught math and programming. We did a mix of typical tutoring, and self study. Lots of self study since I had a natural aptitude for it.

From my experience, the horror stories you hear about kids being stuck in the middle of nowhere with only a bible to read are not the norm, and not what most "homeschoolers" advocate for. Even the word homeschool is a misnomer, a large amount of my time was spent at a local co-op with other "homeschoolers". My wifes youngest brother spends 4 out of 5 days split across two local co-ops. Her eldest brother is in a PhD program after the same experience. Most of the homeschoolers I know are more than able to function in modern society. Homeschooling simply allows for a much more tailored and less systematized schooling experience, making each family educational experience more akin to a startup in its ability to be nimble and respond to individual needs.