First you say he pulled wires through knock-outs without installing groments or strain relivers,then you say he didn;t pull romex through holes and wires are below holes.
The picture you paint with words is too foggy,try posting a couple of snaphhots.

Much as with your other post TAPE is not some magic thing and does not change an illegal installation into a legal one.

Your comments are confusing. If the wiring is ROMEX (a trade name for type NM cable), it must enter the box through a listed fitting (it's not really an insulator, it's a connector that keeps the wire from chafing on the metal and provides some sort of friction to keep the wire from moving. Many of the fittings are made out solely out of metal). There are boxes that actually have the fittings integral to the box (you can tell this because they'll have some sort of clamp that holds the wires in place built into the box.

Under no circumstance should the individual conductors of the type NM cables be exposed from the outer cable sheath outside the box.