Start looking for a new job (or, if you feel up to the challenge, starting your own company). Once you feel comfortable that you can leave and start something e

Start looking for a new job (or, if you feel up to the challenge, starting your own company). Once you feel comfortable that you can leave and start something else, you will also feel comfortable going to management and explaining the situation (make sure you have plenty of hard evidence). Then you'll be able to decide whether you stay and try to work with management to rearrange things in a way that's better both for the business and for yourself, or you move on to one of the other options you've already secured.