I've seen him attacked from multiple angles. Heathen Reconstructionist types think he just makes things up on a whim; things which are not "historically accurate" beliefs and practices. Secondly, those who are something other than far-left of center in their social views might find an extreme "ick factor" to the types of practices he endorses.

https://www.vice.com/en/article/5gaa73/Bow-To-The-Ordeal-Master