Never heard of a hard to move flaps handle. Maybe it's a technical failure? Please report to the engineer. We have some Engine Master Switches that are quite hard to move, but that's because they need some lubrification.
Are you aware that you have to squeeze it before moving? There is a nice mechanism behind, so you can always get one step at the time and not more.
What age is your A330? Do you have several ones and do they all behave similarly?