If you're shooting Terminators, your arrows are NOT too light. Terminator Selects are my favorite non-aluminum arrows.

First thing I'd check - because it's easiest and because I go over the screws on my bow once a week anyway - is axle to axle length and brace height. Get the measurements and compare them against the factory specs for your bow. If the a-a length is longer than it should be and/or the brace height is lower than it should be, then you've got creep in the string/cable rigging. They should be twisted up to put the bow back in spec.

When the rigging is too long, the bow isn't under the proper tension. The limb tips travel further forward than they're supposed to. The string will vibrate more than it should. The cable will flap around. Getting them to the proper length will minimize all that vibration and noise.

The arrow rest having been damaged and 'straightened out' kinda raises a red flag too.