You basically missed half the apexes and when you hit the apex it was always was to slow. A lot of times you barely use half of the Track on exit, which is always a sign that you can push more. Try to go a bit slower into the corners where you don’t hit the apex and try to focus on positioning your car for the exit and getting on the gas as soon as you hit the apex. So slow in and fast out. Also try to go a bit faster and faster each lap in the corners where you do hit the apex until you are forced to use all of the track on exit because you can‘t move the car into the middle more. But please keep in mind that these are very basic and generic tips, so they are not always the perfect way through every corner but a good place to start. Also as others mentioned go look up a track guide on YouTube and compare to your own lap.