I've worked at a startup with poor work culture, long, long hours, and super detrimental to my time and personal health, and it crashed hard. It gave me a lot

I've worked at a startup with poor work culture, long, long hours, and super detrimental to my time and personal health, and it crashed hard. It gave me a lot of experience but I'm not sure the resulting poor health and burnout afterwards made it worth it. Success is not guaranteed by working hard. At best, it increases your chances of success, and probably not by a whole lot.