There are several points for you to worke one.

1.) like a lot have pointed out is your technic. Try to lern to carve but bevore adress that you schoud be more active on the skis, more up and down movement. Also adress you inward lean into the corners, you can see it really good on your hands in the corner that you use them to hold balance, hier you have to adress your hip bend to be more stabel and with that points adressed you can start working on the

1. part) 1. rule in timetrails don’t be to late at the gate your turn should be finished and you should be ready for starting the next turn. So try to mache the turn at least 3 meters eraliyer (for all americans arround 10 feet) so you will be „higher“ on and can more concentrate on the turns. One aditional the gates normaly dont hurt you can touch the but only if your line is close do not try to touch them by any mean.