I don't have spoons to read her attempt at an apology, but it seems like at this point you don't necessarily have to do work for other people to see that there's an issue (the initial point) and she is not going to be able to hear anything right now (or maybe ever). You did good and you are not imagining there being issues with what she said.

If you need to, totally do go other things with your life.

Here be unsolicited advice:

IDK if the magazine did anything other than retract the piece and scrub it from the internet. If I were to have energy to focus on something and want to do something with it, I might focus it there (as they have readership): either talking to the editors about what kinds of disability related pieces they should definitely NOT publish, expanding their editorial board, and/or seeing if they would consider publishing something addressing disability issues by someone with a disability.