It was, especially using harmful and irresponsible things in makeup, production design, effects, etc. and mistreating cast or crew that was par for the course, but even by the standards of the time Wizard of Oz was considered an absolute shitshow of a production

Oh my god this is awesome! I watched this film for the first time a few months ago and was blown away, quickly has become one of my all-time favorites - Amazing to see you review it!