I agree with the points by @codingdave. and I have a further observations : If you are an early startup stage employee, surely you would have an established r

I agree with the points by @codingdave. and I have a further observations : If you are an early startup stage employee, surely you would have an established relationship with the founders. If so, then you should simply bring them up to date with what is "really happening". If you have been sidelined a long-time ago, then you have too look at how and why. Is there anything that you can do to transcend the more recently hired "management". If in your assessment your solution can make millions, then you have to ask why hasn't it yet? Are you overvaluing your contribution or are the various problems the stumbling blocks? As for stock options, etc. At the end of the day you have to consider dilution, etc. They often end up being worth a lot less than you might think. BTW: Yes, I think you are suffering from acute burnout. Might be a very good idea to get professional health support before the stress impacts your physical health.