CFCs contain chlorine (or in some cases bromine atoms), and the intense UV in the stratosphere can scission these atoms from the CFC molecules. So the CFCs are simply a delivery vehicle for these chlorine / bromine atoms. We selected these molecules, because they were refractory, hard to start a fire with / in, were largely non-toxic, and they were polar enough they had targeted boiling points that we could use.
The photocatalytic destruction of ozone by these halogens is well documented.
O3 + Cl -> O2 + ClO
ClO + O3 + light -> Cl + 2O2
… and this repeats over and over about a million times per chlorine atom.
All hail our globalist leaders then. Bring on the carbon dioxide and methane curbs. Yay!!!!