As smedstad has said, your beard looks fine from the front, but what your barber appears to have done is to have placed the line at the sides on the jawbone rather than behind it, with the result that your beard does not appear to "tuck in" under the jaw as it should. If you run a finger under your jaw so that you can feel the bone and then move to the soft part behind it, that will give you a better guide to positioning the line rather than drawing it with an eyebrow pencil which could be misleading.

Keep growing. Stay bearded!

wulff