Is it worth leaving? Hard to say for your specific situation, there's thousands of variables that no one here will ever know. Unless you are a superstar or independently wealthy, it's typically a bad idea to leave a job before you have something else lined up.
Is it worth looking? Absolutely! It will be much easier to make a decision when you're comparing your current position to a job offer, rather than comparing your current position to an unknown. I would also add, no matter what you feel about your current job, it's always a good idea to keep feelers out there for new positions. The fastest way up the rank and salary ladders is moving to new positions. It will always outpace internal promotions.
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