transmission difficult to shift

[Tieny]

Nice! It’s good to see posts being actually being solved. That missing rivet on the pressure plate would definitely cause an uneven disengagement where it’s probably only pressing on half the clutch and not fully disconnecting the clutch from the pressure plate. As for causes on why that might break? Only thing I can think of is too much clutch kicking and launches. The plate looks okay besides the uneven contact areas, (you can see the marks where it only contacted in the area near where there are still rivets), but with no obvious burn marks so I didn’t think excessive heat was it. Or it could be cheap parts