Whoever told you you have to give a months notice is hilarious, I would have seriously laughed. I hate smart asses like that that dont know anything. Your boss doesnt have to give you a month to fire you.. why would you have to give them more than 2 seconds to quit? You dont. You made the right decision, hands down. Focus on the fact that you're going to be in a happier place. Nothing is worse or more stressful than going through numerous bosses with different work ethics and having to work in cliquey environments. That being said, I quit my job last week for similar reasons. Far too cliquey and too many politics. New bosses that didnt understand how things worked and tried to delegate improper tasks. The abuse felt like I'd been stabbed in the heart with a knife for weeks. I left without notice. Good luck with your new job!!