The physical damage to your leaves could be caused by chewing insects, such as grasshoppers, caterpillars, earwigs or slugs.

The best time to check for possible culprits is after dark when they are most active. Keep in mind that caterpillars will turn into butterflies or moths so you may consider tolerating some feeding damage to your leaves if you find caterpillars eating them.

Without actually seeing the insects, I can only offer some possible culprits. If you observe grasshoppers on the plant or elsewhere in your garden, this could be one of your culprits. Unfortunately, it’s difficult to control grasshoppers and their damage because they are so mobile. Here is a fact sheet about grasshoppers in the garden. https://extension.colostate.edu/topic-areas/insects/grasshopper-control-in-gardens-small-acreages-5-536/

Is there mulch around the plants or is the ground usually kept wet? The combination of heavy watering and deep mulch creates a perfect habitat for slugs and snails. Slugs or snails may also be a culprit. Turn over your mulch and look for slugs or snails and their telltale trails. If you do see slugs or snails, you can make this area less hospitable to them with less mulch and less moisture. Here is some more information about how to control for slugs: https://extension.colostate.edu/topic-areas/insects/slugs-5-515/

Earwigs are another insect that chews leaves and also like a wet environment:

 https://extension.colostate.edu/topic-areas/insects/european-earwigs-5-533/