@azidahaka
In a 10 corner track if you lose .300s on each corner you will be 3s back by the end of the lap, and if it´s a corner before a long straight you can lose even more if you mess up your exit.
I could lose that on parabolica when I mess up my braking point, usualy braking to late, it makes you lose a lot of speed to be able to rotate the car and get on the power again.
Usualy people focus to much on braking as late as possible and compromise their corner speed and accelaration point.
Don´t get me wrong, branking as late as possible is good BUT only if you can still hit the corner´s apex and accelarate right after you hit the apex.
Take ascari for exemple, i try to be on the throtle even before I hit the apex of the first left and maintaind full power through out the next right and left to maximise my straight speed.
BTW do your car uses more front or rear tires?
I just saw your video, and on parabolica you brake too soon, you lose too much speed and you did´t use all of the track exiting the corner.
On the first chicane you approach the first corner too much to the right and too soon that make you get a bad angle for the second corner, making you losse speed and conpromise your accelaration point