From the photo, the holes in the older leaf and the chewed leaf margins appears to be from a caterpillar or snails. Was the plant outside previously where it could have been exposed. If so, maybe the problem is no longer a factor.
Try to identify what the pest is. On a small plant you can sometimes pick off a pest, or take it outside or in the bathtub and wash it off, and not have to spray.
Neem oil is a preventive repellent for insect pests but may not affect snails.