Basil leaves eaten
I have always had a problem growing basil, different varieties. I usually buy plants and within a few days all of the leaves are eaten, at least they look like they are eaten. They're all shriveled up. I don't see anything on the leaves and nothing else in the garden is eaten.
Certified GKH Gardening Expert
The most common culprit for this is slugs. They love basil leaves. Read this article for some advice on getting rid of them: https://www.gardeningknowhow.com/plant-problems/pests/facts-about-slugs-and-how-to-kill-garden-slugs.htm