Why Retail Investor Lose money in the Stock market ????

I had posted blog on 17 March- 2017 named   For Hyderabad viewers View Link ,   and i wanted some input from Hyderabad construction market from the Hyderabad viewers. I can sense that many viewers from Hyderabad view this blog and they might have read this. But no anyone posted information regarding Hyderabad Industry product and its brand status. Because retail have never interest to know the co.,its product , its market etc. They want only ready made tips, and they want to invest and want to earn million over night. And thatswhy retail investors always lose money in the market because they dont want to learn, study and homework about co. When one stock is selected to invest in , there are lot of work to do before investing as you are going to be a partner of this co. and you have also some responsibility to look that how business and co. doing and making smooth business. Yes as a investors cum partner of the co. it is your responsibility too no matter that you hold only one share of that co.
  So please if you want to be in the market do some home work or never come to the stock market otherwise nothing except losing money here.
  The thing has disappointed me.