I didn’t really have to actively do anything out of vengeance but the former employer ended up worse off.

I was teaching science including senior Chemistry at a private school. At that time, mid to late 90s, a lot of linked private schools were doing anything and everything to ensure a meek and compliant work force. The remaining few brothers and nuns as well as former brothers were serious about hanging onto their power. As a result any staff member who held any kind of branch position within the Union was got rid of your one means or another.

I saw it happen to a number of colleagues around the same time.

In my case, I was subjected to daily bullying episodes by the Principal. I eventually collapsed with a mental breakdown and was dismissed.

When I recovered I found work at a public school and I am still there. I coauthored a Chemistry text book.

What happened to the private school? Instead of having me, a well respected teacher and author, they have had well over two decades of a number of Chemistry teachers. Varying quality. Varying levels of experience. At times it has been a struggle to find anyone.

When the book I coauthored was released, the then teacher wanted it for her class. She ordered it. The school secretary cancelled the order and ordered a different book. The teacher could not understand why. I never told her. She eventually managed to get my book.

So not only has the school had some difficulty in replacing me, they ended up using my book to teach from.