As Dave said above, clutch could be worn out (that would be in the next batch of questions, along with "how long have you owned the car?").
Usually get jerky changes for quite a while before it gets serious though. Hence the "how long..." question.
Trouble with clutch swap is that it is as easy (!) to do the mechanical part as an ordinary manual, but too many people seem to screw up the last bit.
Or they leave it too long so the hydraulics can't handle the force required to move the clutch fork, which pops a seal.
Or they just put it back together wrong and blame the actuator.
I was trying to get in quick before the thread gets thrown in the "one and only..." bin, which I've given up reading (too long, too much dubious info, too much emotion, too depressing, etc.)