Darius needs disabled.
There is a bug on Darius that makes him absolutely uncontrollable.
Use E on a champion and follow up immediately with any ability and Darius paths to a nearby target uncontrollably as if they have a Rammus taunt. No amount of clicking or spamming buttons gives you control of Darius. The only solution I have found is lose vision of your target or kill your target or wait 3-5 seconds.
This bug is more than just an inconvenience. It is game breaking. You either never use E in fear of the bug or you use it and hopelessly path to your death.