Of all the ADCs Jinx is one of THE worst still, i'm not even saying she is bad, but out all of them shes definitely low tier. Her only escape are her unreliable chompers if you are already close enough or can get past them in a variety of ways. In general she is also one of the easiest ADCs to catch. There ARE broken ADCs right now but its not her. You are thinking of Kaisa, Jhin, MF, Draven. The sad part about these champions is that for most of them it's not even their kits that are the problem, it's the insane initial burst damage that Riot has repeatedly supported in this unbalanced season. Stormrazor seemed to be given to ADCs after they sobbed when their ADCs had base damage nerfs, but it's made them way too strong with free burst. Certain runes are broken depending on the champion like MF with Dark Harvest. Kaisa is just actually broken due to her kit alone, but is made worse by the hybrid build she does where she does a billion damage and upgrades all her abilities.