Dang, no severance or healthcare is really brutal and signals to me they probably should have called it earlier.
When NCC Group fired me, they gave me zero days notice and no severance.
They did emphasize that my healthcare would stay good through the end of the month, but they didn't seem to have realized that I would be unlikely to find that useful after being fired on October 31.
I would hope most employees know that is a significant risk of working at a startup?!
But yes, harsh, regardless of how predictable.
Also, healthcare shouldn't be employer provided.
Running concern businesses don't have quite the same incentives nor the same risks of failure.