When they ask why you are cancelling say "No reason". There is literally nothing they can say to prolong the whole experience. Don't volunteer any information. Don't tell them what is wrong with their website. Don't tell them anything. You will make the whole process go longer.
I just say, "Cancel my subscription." Don't play their game, don't give them an inch, if they ask why, just repeat "Cancel my subscription". If they say something else, just say "cancel" and nothing else. They will cave.
