Bleed the clutch.

First R & R the fluid in the clutch master cyl. Then bleed the fluid out via the bleed valve on the slave cyl. until clean clear fluid comes out.

I use a MityVac on the slave bleed screw. Coat the bleeder screw threads with synthetic lube or it will suck air in. If no MityVac (~$40) - get a helper to pump the clutch the old fashioned way. I use Honda clutch fluid.

Your problem may be with your clutch master, slave, p/p, clutch disk or just the fouled fluid or any combination of these components.

A failing pilot bearing would not contribute to the symptoms you describe.

Bleed your clutch and then post your results.

Good luck and Happy New Year,
Doug