He also made the Oculus lineup so cheap by subsidizing the costs with selling your data, that many VR startups couldn’t compete. Now there’s only a handful of groups still making any VR gear. Immediately after that he killed all PC based VR, though you can still do it with an add-on cable or wirelessly (which sucks on most WiFi), as an afterthought.
This just locked everyone into the Oculus ecosystem and Facebook by extension, bricking more than a few headsets in the process. Now you either have to pay thousands to boutique VR outfits, or buy an Oculus and sell your soul to Zuckerberg for a cut rate product.
I hold Mark solely responsible for killing VR as a consumer product.