2001 Honda Civic After Clutch Replacement Trouble Shifting

Had the clutch replaced recently - after replacement, clutch now must be pressed completely into ground before shifting. But more problematic is that when going into & out of 1st, 2nd and reverse mainly, shifting is very difficult & sometimes impossible. Other times it may go in kinda smoothly, it seems random. Also, shudders when clutch is pressed down completely & in gear.

He stated that the old clutch had worn a groove, and the new clutch would be smoother after a while. And that he is also going to remove the transmission again to re-grease with high-temp lube. He previously polished & greased, and it worked for a day, then wore off and was back to old shifting problems. Any other suggestions as to what he could do? There were no problems with the transmission before clutch replacement.

I believe he has bled the lines & replaced the slave/master cylinders already. Probably the flywheel too. Not sure about the throwout or pilot bearing.