Citation: Rectally Sourced Science.

We definitely did something. It just would have been a lot worse if we didn't. In fact so bad that BBC says the planet would have been "uninhabitable."

According to some models, the Montreal Protocol and its amendments have helped prevent up to two million cases of skin cancer yearly and avoided millions of cataract cases worldwide.

Had the world not banned CFCs, we would now find ourselves nearing massive ozone depletion. "By 2050, it's pretty well-established we would have had ozone hole-like conditions over the whole planet, and the planet would have become uninhabitable," says Solomon.

https://www.bbc.com/future/article/20220321-what-happened-to-the-worlds-ozone-hole

Is this true? An article from 2022 indicates things are getting better, just slowly

Today, the ozone hole still exists, forming every year over Antarctica in the spring. It closes up again over the summer as stratospheric air from lower latitudes is mixed in, patching it up until the following spring when the cycle begins again. But there’s evidence it’s starting to disappear – and recover more or less as expected, says Solomon. Based on scientific assessments, the ozone layer is expected to return to pre-1980 levels around the middle of the century. Healing is slow because of the long lifespan of ozone-depleting molecules. Some persist in the atmosphere for 50 to 150 years before decaying.

https://www.bbc.com/future/article/20220321-what-happened-to-the-worlds-ozone-hole