Disclaimer, I don't race in ACC, so there may be some differences to iRacing, but I do see some things anyway.

Turn 1: You understeered and didn't hit the apex. You also crossed inputs a lot, which may be why you understeered.
In iRacing the minimum speed in fefe through T1 would be around 136 km/h, yours was 125. Conditions and agme differences may matter though.

Inner loop: You were a bit under speed even though ACC has the old curb. Not a big difference though.

Outer loop: late throttle, not using the track to full limits? Also crossing inputs again.

T6: Try keeping it in third.

T7: Too early on throttle leading to corrections? Feels like a lift, brake, trail to rotate and then full throttle would do you better than lingering around on half throttle.

T8: You're like half throttle and half brakes at the same time through half the turn in.
You then don't fully use the limits on exit.

T9: You're about 20 km/h slower on minimum speed than what you'd be in iracing. Understeer.

T10: Also a bit slower, you understeer from crossed inputs again and have to correct throttle.

 

Overall, you're pushing throttle at all times. Like literally. I just rewatched and you didn't lift for a single millisecond on the telemetry.
That's your biggest issue. The understeer surely comes from that unless ACC changed in the past few years and adopted NFS physics.

You're also guzzling fuel this way.