As these statistics will tell you, Jinx right now is too dominant among the ADCs: http://champion.gg/champion/Jinx
Nearly a 55% winrate and 30% pickrate on an ADC? Uh oh... Better nerf Ire- err, Jinx.
What do you think could be nerfed safely on Jinx?
EDIT: Okay, downvote the STATISTICS.
TheI3igDaddy2 votesBecause Riot takes their sweet ass time nerfing ADC's regardless of how dumb they are.
See: Tristana, Lucian as of most recent.
They also refuse to look at Vayne's kit either. Whoever OKAY'd % max health true damage should've been kicked in the balls really, really hard.
darkdill2 votesVayne's fine. She can't deal with multiple threats, is outranged hugely by Tristana and Jinx, and has a rough time in early game due to her lack of firing range.
Jinx, on the other hand, can crit multiple enemies simultaneously if they bunch up to her rockets.
Strawberrycocoa1 votes{quoted} Jinx, on the other hand, can crit multiple enemies simultaneously if they bunch up to her rockets.
So... don't cluster up?
darkdill1 votesOrianna tends to have something to say about that.
IcyPepper1 votesShe's a hypercarry, and countered by lane bullies like Graves.
And it saps a lot of her power budget. Her utility is decent, but she doesn't have an execute or some big burst.
You can also use the gromp smite buff and 
to blow her up. And standard adc counter items stand, like 
youngjake932 votesJinx isn't that dominant... The problem is that she is a late-game hyper carry with no real lane bullies. She honestly lanes better than a bunch of ADCs do. Lucian, Kog Maw(after 6+Tri) and even Trist+Corki used to be able to deny her in lane before nerfs. Also, tons of supports and IE have been nerfed which make lanes less snowbally. Plus season 5 changes just made the game a lot less snowbally in general. All of those are meta changes. Nothing has really happened to Jinx. Jinx needs more competition in lane rather than a nerf. I honestly would consider not running an ADC in some comps if they just keep nerfing all of them and buffing everything else.
Curling Veigar1 votesDon't know why this was downvoted.
I have a friend who plays with a jinx player, and EVEN when the jinx player feeds (goes like 0/7 in lane) once she gets an IE she does godly damage regardless of her cs/score..
darkdill1 votesI'd say part of it is how Jinx can deal splash crits with her rockets.
Curling Veigar1 votesIdk. Seeing a 4/10 jinx doing 1.1k splash crits is just stupid imo