New clutch time for sure.
Did you have your flywheel resurfaced when you did the clutch previously?
Clutches also need to be broken in properly, or they can wear improperly or slip.
You might also have a transmission front mainshaft seal or rear main seal leaking fluid onto your clutch.
I'd make sure you get a higher pressure pressure plate as well.
There's many venders here that can sell you a solid clutch setup that will last.
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