Tons more lucky than most. My last startup job misclassified me when funds got tight. A friend of mine who joined later never got paid (good luck filing a wage claim in WA state if L&I’s system still thinks you’re a contractor).
It’s really a bunch of little things that, when seen as off all at once, will trip your spidey sense to jump ship.
If you don't have visibility into that, there are other warnings signs, like various spending cuts. No straight answers to questions about that stuff.
Not providing visibility into the business is also a warning sign, in my opinion.
I've also left companies when they started making pretty weird business bets that I dind't think would pan out.