This. Bungie stayed professional about losing all the rights to the IP they created. They parted ways without being nasty publicly. But if you read the articles at that time, everyone could see they got screwed hard. Sony swooped in, embraced them and it has paid off. It was a golden opportunity to finally have access to the company that revolutionized FPS. Bungie even had part in PS4's controller design, which means they were given unprecedented access to Sony's stuff in regards to next gen. Bungie felt the love and is returning it while Xbox One and 360 is just a cash cow for them as of right now.
It reminds me of Nintendo and Rare back in the 90s. I understand why MS did what they did... but they didn't go about doing it the right way. They were mad that Bungie wanted to go 3rd party, so they intentionally tried to hurt them. The fans have to suffer, but they should be blaming MS, not Bungie... they're too caught up in the fanboyism of it all.