I agree with everything kfullert said, but wanted to add that the ethics here are quite clear: you've entered an employment agreement, which essentially says that as long as you're both happy and you both follow the rules, you'll continue to do the work and they'll continue to pay you. There's nothing unethical about realizing you're unhappy and leaving for employment somewhere else. You don't "owe" your employer anything other than the work you've agreed to do. It would be unethical to get paid to work on your CV or interview elsewhere, but there's nothing unethical about saying "I'm unhappy with this job" and getting another one. Jobs are a lot like relationships: both partners have to be happy, or it winds up being abusive, and once it's abusive, you're better off ending it than trying to rescue it.