WB's also just worse at PR and preventing leaks. I don't know why, but they are. Thing is, every studio has dumb ideas, or embarrassing decisions or cancellations. Even one as successful as Disney, and I'm sure the MCU had ideas floated around from time to time that were also dumb and quickly nixed. That's just part of the business. Everyone's got dirty laundry.
The difference is, we aren't constantly hearing about those. With WB (and their DC films in particular), we know every single bit of news months in advance and every single plan or idea, regardless of whether or not it was seriously considered or ever actually made it past the brainstorming stage.