They realize, they know. They simply just don't care. They will give those who are still there more work. They won't complain because they are afraid of being next.
People are a dime a dozen. They can offshore to India, the Philippines, and other countries; they pay people cents on the dollar. They don't care if they understand what to do. It's a warm body in a head count. They do not care about their employees or the work they do.
The customers pay and that's all they care about. Stockholder value as long as they make the numbers and their board and stockholders are happy; it's a win-win for them.
You will feel so much better once your are OUT!