very unhappy with MacBook Air. Connection problems and a whining on screen

My Macbook 2013 I can not use in weeks thanks to the display is turned off. was almost not able to surf the Internet many times and the only way to fix it is restarting the computer. I am so unhappy with the team. I have just given me problems since I bought my macbook unlike pro seven years ago that works perfect. For a team that has no more than two years it works so badly. and you change the screen once and almost 2 months later get it back. now I take it back to technical service to remove me for 2 months and more beyond that to buy me a technical service overpriced and of poor quality.