Ahsoka Ronin

Really, the way the Jedi Council behaves in this episode perfectly exemplifies why this whole tragic mess began.

Good guys who try to beat the bad guys and do whatever it takes to achieve that goal become the bad guys themselves.

Anakin's a bit further on the path than the Council, but the journey is the same.  It takes another generation to show us that yes, redemption is always possible - you just have to be willing to put someone other than yourself first.