I fly A320/A321/A330.
I do find the A330 sluggish compared to the 'little' jets, but this is to be expected for an aircraft weighing 230 tonnes; it has a lot more inertia !
I don't find it a problem at all, and I quickly adjusted to it.
The A330 autothrust does seem lazy, but as long as you allow for it, it is not a problem.
It's a big aircraft !!!!