The hole in the ozone layer opened when it got warm (1976 - 1998) and began contracting in cooler years which are now so frequent the hole will be closed by about 2040.
As for CFC's, well, the models all failed and instead of a consistent drop in upper atmospheric chlorine by two parts per trillion per year, it measured out at +200 to -150 and there was no trace of a signal whatsoever.
So after ten years of looking there is no data to support in any way the idea that CFC's had anything to do with the ozone hole. The proof that verified the models an expensive global engineering change justified turned out to be false.
The expiry of DuPont's CFC based Freon (tm; "R12") Patent and subsequent taxpayer funding to remove all R12 in the world and replace CFC's with R34 based HCFC's that are "only 98%" as harmful must have been a coincidence. Be that as it may, the old CFC had economic advantages in cases and have been banned at great cost to the taxpayer for political and not scientific reasons.
"Perhaps the greatest use of TCE has been as a degreaser for metal parts. The demand for TCE as a degreaser began to decline in the 1950s in favor of the less toxic 1,1,1-trichloroethane. However, 1,1,1-trichloroethane production has been phased out in most of the world under the terms of the Montreal Protocol, and as a result trichloroethylene has experienced some resurgence in use as a degreaser."
"TCE is also used in the manufacture of a range of fluorocarbon refrigerants such as 1,1,1,2-Tetrafluoroethane more commonly known as HFC 134a."
Without the manufactured crisis of the ozone layer hole DuPont would have had to pay for extraction of the R12, all the equipment to extract it and for the replacement materials and all that equipment to replace it. Instead they were paid to do this at taxpayer expense.