Enthralling question.

I don’t really know.

But perhaps, a large[st] part, abuses by authorities. [And being smarter/wiser than some “teachers” etc., probably too.]

… And that’s not viable to recommend.

I shall be looking for more purely positive "What made you become an anarchist?"s.

Though as I type that, I see again the “made you”. Made me? I wonder how much did I choose, and how much was I made to be an anarchist…

Exposure to anarchist thought (~ not mere academic and literary, but real world), surely healthier.