u/Buloninho

Hi I have had a Nepenthes for 2 years but for a few months it has been quite strange I cut "cramed" leaves and others with white spots (picture 1), I first thought of a parasite so I cleaned my plant several times in recent weeks but no improvement, here are photos of the plant.

It is watered in abundance 1 to 2 times a week it depends. I use tap water which is surely full of limescale especially in my region in France, is this a cause? Maybe the substrate is devoid of resources? Should I repot it? Thank you for all those who will take time to help me and apologise for my shaky English.