What are Jinx's weaknesses?

"Immobility" and "weak early game"

One of her early game weaknesses is diffidently lack of reliable escape , if she gets out of position and you are quick to act, she can have a really hard time getting back to a safe spot. She also lacks early game burst potential.

As with most adcs however, the lane is largely decided on what kind of support they have with them. A jinx with a soraka is going to play differently than a jinx with a leona for example.

No escape mechanism / dash.

I rape Jinx so easy as Evelynn...

I find that she has a somewhat hard time against short range assassins/fighters. Her kit doesn't allow for split second actions.

poke can work really well against her, and engage can really get her down too.

it's important also to be aware of the potential of the enemy abilities. sometimes I lose lanes I should win simply because the support tries to poke the enemy at the wrong times, for too long, or in a bad position, and we get out-traded because of it. sometimes I lose lanes because I misread the enemy's movements or overextend or overstay or simply fail to dodge poke/engage I shouldn't've let hit me.

The problem with Jinx is that she has no answer to champions who can force fights on her. She is strong when she can fight on her terms, but she has no answer once the fight is already on her. A couple ADC's that I think do well against her are Ezreal and Draven.

Draven is good at forcing a fight on her and out trades her early game. He also scales relatively well into the late game.

Ezreal works well because he can use his Q to poke her at a distance.

AS for champions other than ADC's, basically any engage champion or assassin will work well against her.