Issues along jaw line. How can this be treated? (Photo)

It looks like you need more extensive surgery and better surgeon. Very likely that lower face/neck lift would be procedure to consider. Surgical result in face/neck lift significantly depends of the experience and skill of the surgeon. Good luck.

In my experience, wide undermining encompassing the entire anterior triangle of the neck, corset platysmaplasty well below the hyoid (cervico-mental angle), sub-hyoid subtotal transverse platysma myotomy to prevent recurrent bands, removal of excess (including jowl) fat, weakening the anterior belly of the digastric muscle, skin re-distribution, and occasionally additional measures are fundamental to restore smooth neck contours, a youthful facial shape, and well defined jaw line. No short cuts.

From the submitted photos it appears that a revision to your neck lift will be needed for improvement. Be sure to research your surgeon. Visit the ASPS website to find experienced board certified plastic surgeons in your area. Review credentials and before/after photos to find a surgeon that meets your criteria.

As seen in your posted photos, though they were not done in good lighting, appears you have had limited undermining or lifting effect more Lipo effect causing these issues. A complete revision of neck lift is indicated with no liposuction and a submental incision extended also. Fee is $20,000, very difficult revision case. Best virtual consult with.