I have seen 5 unique ones, yellow, red (saw same one 2 times), blue (saw same one 2times), gray (saw same one 3 times), black (nismo) in the same time frame in the GTA
Clutch fluid would only affect the clutch pedal and I guess the response, which I don't think I have a problem with.
Only when shifting the gear. it gets stuck and not fully in gear and then I released the clutch and grind noise, I quickly shift back to neutral and try again.
Mines quite notchy sometimes, after warming up, grinded the 2nd, 3rd, 4th gears 1-2 times over the 2+ years. I'm not switching the gears at a fast speed either.
Of course there are more, but there are over 9000x more corollas, civics, camrys, accords than Zs on the road. Of course not every wrecked Z are due to the driver's ego but since it's a sports car it's much more likely.