I'm going to rate "exploits addiction to make billions off of legalized gambling for children" as worse than putting out a sub par, broken sequel with DLC 5 months after release.

In a hilariously circular way, EA has this beat still.

The Simcity 2013 launch was so terrible it killed Simcity and the studio Maxis, basically paving the way for City Skylines to take over the genre 2 years later.

It was online only, to the point where if you disconnected from the Internet you were booted out of the game. It also did most game rendering server side to force multiplayer/anti piracy/EA Origin store, and they only had enough infastructure for 1/10th of their player base on launch. That 10% isn't exaggeration, either. They underestimated server load by 90%.

It was also a severely buggy, local resource hog somehow, even with being mostly remotely rendered. Since only a tiny fraction of the servers needed for the game were online, the game just chocked itself to death.

It took months to get it to a "working" state, at which point people had discovered all the insane and dumb behavior by ingame actors like citizens just picking a random house to go to end of day/etc. The tiny city limit size caused by being always online was also a very sore point for players, as you could barely build anything in a city building game. You could finish buillding your "city" in just a few hours, at which point you had to buy another "zone" that was separate from your current one. They didmt seamlessly connect like old SimCity or city skylines, you actually entered another tiny city slice to build on. It was terrible, and the size limit was clearly one of the measures to reduce server costs, as each zone looked like it was a new small server instance.

By the time they actually resolved the server issues, the game was dead, ending a 20+ year legacy in gaming for the brand and the studio. EA hasent made a simcity game in 11 years because of its failure. It was a shitshow and a half.