Could be that they're siloed and there is product but OP is poorly informed. If they don't work there, then how could OP truly know?
I'm not poorly informed, otherwise I wouldn't be making this post. After everyone left I am in the most senior engineer position (lead) and there was no one left on top except for me and the CEO.
At the moment, it sounds like you doing BS work and chasing your own tail.
It might be more interesting to change your attitude and jump on the delusional train (which a lot of startups are tbh), take the CEO more seriously and start building exactly what they want (or at least start prototyping). I don't think anyone will criticize you for taking the initiative and having a general positive attitude and start getting shit done.
It sounds like more fun than what you're currently doing, while you think of your options.
> So I was hired in this startup a year ago.