Crits

What did they do to crits? I'm not even doing half the damage I was doing a week and a half ago as full ad crits jinx. Like I know that they are trying to balance it, but only doing 600ish dmg to an enemy not building tank, against a say, chogath or other tanks I'd get deleted without a chance to win. What did they do? Are towers the only thing that I could pheasibly take down? Why rito? Why did you make the late game so weak for a champ that is already weak early? Is this what balance is? What happened to all the damage?