Many Luddites were protesting labor conditions. At the time the majority of labor laws were being written by the capital class with the help of political leaders and the constabulary. Common complaints were working hours, child labor, safety, wages, and protection from furlough. There were some who protested the quality of the product the machines created... but I would say those are the minority.

Destroying the machines was a way to gain leverage for a class of people who had none. People had been using looms for centuries. It wasn't the technology that was the problem... that's what the victors, the capitalists, have written was the reason.