Entry is your starting condition
A corner becomes easier to diagnose when you enter it from a repeatable position. Pick a visible reference such as a road marking, barrier, sign or building edge. Use that reference consistently for several attempts.
If the car enters at a different speed every time, it is difficult to decide whether a later problem came from the line, steering or throttle.
Rotation is where the direction changes
If the car runs wide, do not automatically add more steering. Consider whether the entry was too fast, the steering was too abrupt, or the car was already using too much available grip.
Try a slower, cleaner entry and compare the result. A change in entry speed can tell you more than several random setup adjustments.
Protect the exit
A corner should not be judged in isolation. A poor exit can make the following section difficult. Leave enough space to accelerate and position the car for what comes next.
Describe the mistake precisely
Replace vague notes such as “the car feels bad” with observations like “the front runs wide when throttle is added near the exit.” Precise observations lead to better tests.