Golf is a difficult game to master, and most golfer don’t have time to practice sufficiently. Perhaps that’s why eighty percent of players have a 18 or more handicap.
Nevertheless, that is no reason to grow impatient. Rome wasn’t built in a day. It takes 5 or more years to learn most trades or professions. So don’t despair. Golf is a learning experience and like fine wine, it gets better with age.