Thank you for your question, Holly. It is almost impossible to diagnose a plant problem without photos and/or an examination of the plant(s). Since the Extension offices are closed to the public, you can't take them in there for an exam. I'm afraid the best I can do is give you links to the various diseases and insects known to impact holly, so you can compare with what you see. I urge you not to apply chemicals until and unless the problem(s) get identified.

Here are various diseases:  https://pnwhandbooks.org/plantdisease/host-and-disease-descriptions?title=holly

Here are insects:  https://pnwhandbooks.org/insect/crop-pests?combine=holly

The webbing certainly is good evidence of spider mites, but leaf holes are a different problem.  You're going to have to do some close examination to accumulate enough information to use the information, but what you've described could be about half of these.  If you can get someone to help you load some clear photos, and write back, we can keep trying.  Good luck!