As a publisher they have a tendency to interfere with the development of games by implementing rules about integrated-DRM (SimCity's always-on debacle), DLC (Mass Effect 3's "From Ashes" day-one DLC being so integral to the story), stifling creativity by allowing marketing to dictate artistic decisions (Dead Space 3 switching gears from moody survival horror to yet-another-third-person action game) and in-game real-money transactions (Mass Effect 3 multiplayer, Dead Space 3, etc.).
It's not that they make bad games (personally I'm a big fan of Mass Effect 3), it's just that generally they have a lot of anti-consumer practices that kludge things up.