I have few ideas:
-not enough competent staff that know game making
-no testers/no time/no will for proper testing updates before release - use us a community mob, to be free beta testers
-lost passion for game making
Also this youtuber point each thing that not work in funcom properly durning chapter 4 dev stream release:
My Thoughts on Age of War Chapter 4 | Conan Exiles (youtube.com)