Your going to sue your co-founders as individuals? If so, what are the claims? — sounds more like a suit you would bring against the company, but if the company doesn’t have any money, you won’t get anything (except for maybe the ip assets as part of a settlement)

Speaking from experience, avoid litigation at all costs. It’s just not worth it. Your owed $250k? Well you’ll never get that in a settlement — cut it in half, then lawyers fees you be left with a fraction of what you thought you would get. Plus the mental toll of being involved in litigation