Failure is not final if you learn lesson and keep going. Many successful business or inventions once failed but become successful when people don't give up. Failure comes with lots of valuable experiences that would be used in future to run startups. New business owners might make mistakes that will have an adverse effect on the business; this is why the failure rate is relatively high.
I am just recalling how my poultry business faced financial problems in the first year. I never knew that I could sell the fowl droppings to farmers, which would be used as manure. I also didn't know that some parts of the animal could be used for different purposes. I was busy disposing of them, and it affected my profit. After about one year, I gained more knowledge and began to make a profit.
I have seen people in my life who work hard all their lives and achieve nothing and I have also seen people who do not work hard and achieve great success. This is a natural system but it is widely believed that you can achieve a lot with hard work but sometimes hard work does not succeed and some work is also based on luck. That is why to do it well, our previous hard work makes us better than before which protects us from mistakes. It was our own luck based on hard work and thinking due to which you will succeed and you also had to go through some problems. There are many such things that we do not know but when we think with good thinking, we get such very profitable things in which you have succeeded.