Is the constellation theory really accurate?

I have been studying constellations for a year. According to my investigation, all the people around me have personalities that match their horoscopes. Everyone's astrolabe is made up of ten stars, and each star represents different meanings, such as the sun representing father, appearance and vitality; The moon represents mother and heart; Venus represents marriage, feelings, etc. You only see your friend's sun sign-Sagittarius. You haven't seen him or nine planets, so you can't judge him only by the sun sign. Of course, the sun has the greatest influence on people, so most people conform to the character of the sun constellation.