I can't tell without throttle input displayed, but you're a little stabby with the throttle in mid-corner. You're off throttle, then test the waters with a stab and then lift really quick. 3 quick movements pushing the car further off your line. (As pictured earlier) On longer turns you need to find the throttle input that equals the amount of grip available and stay with it. If it's not fast enough gently apply throttle. You're still a bit too egger, your fun is out weighing your fast. Also, you're trying to flow, rather than approach each turn uniquely. Ideally, you want to maximize the track so you're accelerating/braking in as straight of a line as possible while finding the smallest apex for each turn.
This video does a great job simplifying driving lines and WHY they are what they are.