To add more details about what Nairbons mentioned with Kemono Friends:
Appearently, the main reason for letting go/firing Tatsuki, the director, was his lack of communication with Kadokawa, the company, and using the licensing of Kemono Friends without their knowledge and permission; mainly for creating episode 12.1.
Kemono Friends - episode 12.1
https://www.youtube.com/watch?v=cYqjDcKfZN0Back in Sep. 26, Yaoyorozu, the anime studio, made the intent to pull out of the project due to Tatsuki and the lack between Yaoyorozu and Kadokawa. Some people are saying the staff quit and "are staying on the sinking ship with the captain", but I can't find any news sources out of Reddit to support that claim.
http://www.animenewsnetwork.com/news/2017-09-26/kemono-friends-site-anime-studio-yaoyorozu-pulled-out-due-to-communication-issues/.121883Now there are some protest and petitions that have been going on between the fans and Kadokawa about rehiring Tatsuki for season 2, which was confirmed before this event.
For example, here's Japanese version Nairbons shaving his head in protest. You can watch the video in the link below:
https://www.youtube.com/watch?v=4nfGDDwLRsU