Katarina is "Balanced"
Well Basically, Katarina is about the most balanced champion in the whole world. Now some of you might say "Shes easily countered" but not everbody has a tank that can only focus on knocking up katarina. The only reason is that she has a absolutley disgraceful scale in both AD and AP in her abilites allowing a Rabadon's Deathcap To instantly add another 300 Damage to her ult which will inevitably lead straight onto a penta. So the only thing im asking for is why not rework her and just make sure that her abilities dont scale like a escalator.
Now others may say that "Katarina is a hard and difficult character to play" and you know what i call bullshit on that statement as all you have to do is not be stupid enough to die before getting your first kill before going to bot lane and getting a double massively increasing your money meaning your items are far ahead everybody else.
Finnaly, a katarina appears every 3 games i play on average and a counter for her nearly is never seen.
you probaly had a mirror lane & won. Who's their jungler, did they even have one? This smells to a low elo game. Riven & Draven where the only one that could interrupt her ult & even than they can't react directly on it. Additionaly based on the layout this was the pre nerfed kata & the pre nerfed 
. Also the pre buffed magic resistance so MR items where still really expensive. Additionaly none of the champions above could build 
with good synergy. Maybe someone could build 
but back than it was way more expensive.
