Best Hypertrophic Scar Treatment?

You must first distinguish between hypertrophic scars and keloids. The former generally tend to grow for up to two years but then mprove over time after that. Keloids tend to exhibit continuous growth.
Hypertrophic scars are commonly associated with wounds that exhibit delayed healing: tissue loss, healing by secondary intention, third degree (full thickness burns), etc.
IF your scars are hyperftophic, they will tendi to resolve. However, interventions which have been recommended include:

Pressure
Massage
Topical paper tape therapy
Topical or intralesional steroids
Topical silicone gel preparations or sheeting

Although Cocoa butter, Vitamin E, or Mederma have been touted by other practitioners, there is minimal scientific data to fully support these claims.

The good news about scar treatment is that they can always be improved. Pigmented scars can be lightened, red and purple scars can be corrected, depressed scars can be raised, raised scars can be flattened and scar texture can improve. The reality is, it often takes multiple types of treatment to address each aspect of the scar, and even with great improvements, scars will never fully be gone. 
Lasers can help change the pigment, red or purple color and texture of the scar. Fillers and mechanical subcision can be used to raise depressed scars. Various injectable treatments can flatten scars. The right combination of those treatments will depend on your individual needs, goals and anatomy. It takes an expert in scar revision to help choose and present your options, and you need someone who has all of those mentioned treatment modalities available. 
To ensure you are receiving the highest level of care, seek out a modernly trained, new-school dermatologic surgeon, oculoplastic surgeon, facial plastic surgeon or plastic surgeon who is board certified and fellowship trained in one of these "core four" cosmetic specialties. Membership in organizations like the American Academy of Facial Plastic and Reconstructive Surgery help to identify a highly trained surgeon.
Cameron Chesnut
#realself500 Physician

There are many treatments for hypertrophic scars but the best
treatment really depends on the patient and their specific scar.  Some mild scars are best treated with daily
massage and over-the-counter silicone sheets. 
More significant scars can be injected with steroid to reduce their
substance.  Depending on your skin color,
lasers can be used to destroy scar tissue and redness.  However, lasers can cause skin of color to
change color and that is why it is very hard to speak in generalities.  Furthermore, dermabrasion or even scar
excision/revision are options.  Your
local board-certified dermatologist or plastic surgeon should be able to review
your specific needs and make a plan of care that works best for you.