I volunteered to support because my teammate got autofilled

And then I got autofilled to support the next game...

You should be given autofill protection even if you don't queue up to fill/support, but still play support in-game.

There is already a feature where we can trade champions, so why isn't there a feature where we can trade roles so the system can have a more accurate way of telling who played what role? This way people who volunteered to support will also get auto-fill protection while the autofilled person who traded their role won't.