I am not convinced. Pretty hard to point to a control data set to prove that too. There have been some pretty strong arguments all along that the ozone hole was more a natural part of the ebb and flow of the ozone layer, and that volcanic activity plays the largest role in depletion.
But I am skeptical of most of what the globalist authoritarians are pushing, so I do admit to an automatic bias against them.
I’ve seen papers in atmospheric physics to that effect.
They say ozone changes are due more to changes in the strength of the earth’s magnetic field and changes in particle flux from the sun.
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.