Why is the charge rifle allowed to be this bad?

The charge rifle is not a bad gun by any measure. If you can track targets it's probably the easiest sniper to use. You don't have to account for bullet drop, just point and follow the target.

@Biochemikas I prefer the longbow or Sentinel.. I've become a peak-a-snipe player and these guns are better suited for it. Plus there is nothing like a headshot from a charge sentinel landing for 140+.. You want to see an enemy squad full on panic, land 2 consecutive charged head shots from a Sentinel. I also push my armor and my teammates armor up to red if they'll let me snipe. once I have one red armor I swap with one of them..