Exactly my experience.Stiff clutch pedal
Worn out clutch normally
Squeaking and or pedal not returning
Slave cylinder normally
But nothing is garenteed
I would measure the release arm I posted the correct measurements awhile back
Or grease the slave and see if the problem improves
Squeaking clutch pedal cured by fitting a new slave cylinder. Heavy clutch pedal did point to a worn (but not worn out) clutch, and after fitting a new clutch, all is now absolutely fine.