People just say shes easy bc they're mad. I know after rework she was strong af. Rework was a huge buff.
Now i'm taking both sides on this. As a Soraka main I could ruin the old kat. Now you can shunpo like a million times. It resets a lot on its's own and you get a move speed boost and your damage is moved into your passive.
As Soraka I couldnt do shit vs the rework. They said it gave people counterplay but I think it only gave the Katarina more counterplay options.
It's hard to see the difference between shunpoing to a dagger and shunpoing and ulting. And if you do ult it does amazing damage immediately even if you cc her in .1 second, that 1st .1 second prolly took like 60% of 3 peoples hp.
But I havent played vs her in a while. The thing that pisses people off I think is all of the shunpoing w/o takedowns and the move speed = Yasuoish mobility w/o the need for minions or takedowns even.
tl;dr imo shes hard to be good at but easily destroys people who arent careful, too mobile, doesnt need takedowns for so many shunpo resets.