For anyone unfamiliar with Anthem (including me, before I read the second Onion article) and curious about what happened, Wikipedia covers some of the executive decisions and leadership changes that hurt the effort:
https://en.wikipedia.org/wiki/Anthem_(video_game)#Developmen...
The "Frostbite" engine sounds like a disaster.
The frostbite engine seem to be the tip of the iceberg.
Core issue was lack of clear leadership from what I read on Wikipedia.