because of mismanagement and cultural clashes between game developers and the company’s principles
I can't stress how much damage those two points have made to their game studios. They try to treat game developers like web developers and hire game developers in the same way they hire web developers. Over half the hiring process is determining how well the candidate demonstrates 12 different values that Jeffy Bezos promotes, which generally means you constantly lose extremely talented people because they don't have a bullshitting meter that corporate managers crave. The ones that do get hired often end up being less talented and good bullshitters, or very talented and very stubborn. Absolutely doomed to failure from the start.
At least Lumberyard is being used for groudbreaking releases
https://store.steampowered.com/app/613580/The_DRG_Initiative/
Talk about the absolute worst choice of game engines (well, better selection than CryEngine tho) for a small indie studio. At first they wanted to target indie developers, then they bought CryEngine and painted themselves into a corner of "Oops only AAA developers now"
This seems to be par for the course with Amazon. They've released a bunch of mobile games but when it comes to making real games, they released a shitty Grand Tour game, have one that is being delayed forever and have cancelled 5 others.