obsidi, you're downplaying it a bit too much.
I work for a big telecom organisation and we deploy a lot of stuff. Off course sometimes something goes wrong, but every time it does we try and take learning from it and prevent it from happening next time.
(Also I disagree with how QA should be a skill every developer has. QA is not something you can "just leave to the engineer", you need to embed it in a process, apply e.g. a 4 eye principle, a staged process that ensures testing is done, validations are in place before something is deployed. But with that we go off topic)
Nexon is on a whole different level. Each and every update or patch (and that is no exaggeration) I have seen (and I have been playing for 2 years now) has contained at least 1 bug, which becomes apparent by the entire player base right after deployment.
Quovatis observation is correct: Nexon has bugs all the time.
I'm not so sure if his observation about the quality of the QA process is accurate though, because that would imply a QA process even exists at Nexon. And I begin to doubt if they even do.