Why does this website suck so much

Sounds like someone picked a champ just because they were an opponents counter but had no practice.
Shame.

does it?

Because you dont lift

Also nobody counters kha'zix except for ryze.

And nobody counters ryze except for another ryze, and sometimes annie.

But mostly another ryze.

Because Karma OP and no AP other than Diana beats her

lol if you look up Karthus on there its very lulzy when you realize hes not particularly strong against like anyone except minions in lane

I don't use the site to counterpick. I use it to know when not to pick a champion that I like to use. I instead go for a champion that I PLAY that can handle the situation better.

Don't listen to websites like that for information on counterpicks.
If you do use it though look at the comments and not the up or down votes.
If you see a counter and Dyrus (who comments alot there) agrees with it and says it works then go with it.
But don't believe most of it because people will just put it if they won or lost against it in a game they play.