Re: What is the secret to the longbow?
Take your time to practice it in the firing range. Pick 2, one with 4x-8x (or 10x), the other with 2x-3x(4x), fill a golden backpack with heavy ammo, then enable the AI enemies with the cheat, they're much better than the fixed / slow moving targets and sometimes have an unpredictable change of direction. Try that for like 30 minutes, then go into matches and you'll probably see improvements.
The abuse of G7 may be a reason why the Longbow feels inconsistent. Many players got used to spam shots fast and use hipfire more in close range while jumping and running around. This doesn't work with the Longbow, as it has a slow sway and fire rate, while it also doesn't benefit of the generous projectile spread of the Triple Take.