I've already talked with management and the offending behavior has been flagged as "not ok", but I was the one punished. The offenders are on the list to be promoted. Thus, I'm leaving.
The career break isn't necessarily related to the workplace issues, but the drama has burnt me out. Taking 6mo-1yr to recharge and work on random stuff would be great mentally.
Future employers will question a 6-12 month long gap and may read things the wrong way if they see it next to a short time at your most recent job. Granted, that's not to say that it would be a dealbreaker for a future employer, but it will be something that comes up.
Whatever the case, it sounds like the decision you make will be the right one. Good luck in your endeavors.