I used to work on the Frostbite team at EA and it was quite the train-wreck. Many game teams spent considerable time moving to Frostbite only to fail and go back to the old game engine, the game teams which managed to move to the frostbite engine were unable to keep up with engine updates and got stuck on old arcane engine versions, the frostbite engine team was split between multiple geolocations and the teams in different locations didn’t get along well and ended up developing silos, and finally there were about a million layers of management in the frostbite team — I heard from old timers that the team used to be much more engineering focused.
Counter example would be all games made using the Unity engine and the Unreal engine no? Or how well RE engine is working out for Capcom. Or how the Decima engine works out for Sony and Kojima, etc.
I have a bunch of friends who work for an EA studio (or who used to work for an EA studio) and they all _hate_ Frostbite. With a passion.