People Upset with Darius Being Free
Honestly, I find so many people who are upset with Darius being free to play... All you need is Riven. Take this example:
Riven vs. Darius Riven player < Darius player Riven keeps getting free shots on her. Riven hides under turret. While Darius is under her turret she stuns him and attacks him, usually getting one turret attack on him. Riven uses this strategy and kills him, gets fed, carries the team.
In conclusion? Riven > Darius
and farm in peace