It sounds like most of your stress is being caused by not having a Product Manager. You should find out what the deal is there from your manager, and if you don

It sounds like most of your stress is being caused by not having a Product Manager. You should find out what the deal is there from your manager, and if you don't like the answer, then consider leaving. Beyond that I would say, don't leave a job just because it isn't a dev utopia when you walk through the door. A better measure of when to leave a job is when you know that your goals and theirs don't align and never will.