When the clutch pedal is not working properly, unbolt the slave cylinder from the bell housing. Then have a helper step down on the clutch so you can see if the slave cylinder piston is being pushed out under sufficient pressure to engage the clutch inside the bell housing.
That the clutch works ok until you step on the clutch pedal several times makes me think that the problem is still somewhere in the master-slave hydraulic system. Like there is still air in the system somewhere. I think this may be why the factory only sells the hydraulic clutch system as a sealed pre-bled ready to install assembly.
I would try bleeding it again.