Poppy

A good poppy can ruin your day.

Janna

You can outplay a Janna, but a good Janna can outplay you!

Zyra

Zyra is insanely good against you early. Otherwise you shit on her late.

Kled

Kled can ruin your day if you miss time your Slingshot.

Darius

Play around his pull (A good Darius can hook you mid flight!) , you win lane late! Lose early.

Thresh

Thresh's flay

Lee Sin

Pretty much if you get kicked towards your team or their team, its a coin flip on who wins that fight, Lee kicking you back to your team allows for you to peel. Lee kicking you towards their team allows for a good ult and a good follow up (your e should be able to pick of anyone else, also a good way to run)

Kayn

Prioritize other lanes when against a Kayn as he will either ruin your jungling experience or continually gank lanes. Red Kayn's knockup can stop your e. You win against a blue Kayn.

Fiora

Parry is insane!

Anivia

Anvia's wall can be timed to stop Zac's jump midair.

Aatrox

Haven't played against enough Aatroxs but you can win if you're ahead.

Camille

Camille stops you from engaging and escaping.

Rammus

His q stop you midair.

Volibear

His fear is insane against you.

LeBlanc

When jungle don't ever gank mid, only apply pressure, and counter gank if you can. When against Leblanc focus on trading and setting up for your jungler.

Shaco

You destroy Shaco. His box and clone can proc your q.

Illaoi

Your q cannot proc on her tentacles! You can fight her just dodge her q and her soul pull.

Gragas

Gragas can stop your e with his e!

Veigar

Time his wall and you basically trash on him.

Akali

Your q stops her from getting her passive, and your q can also stop her e mid dash. Your q can reveal her invis. Your q is gonna ruin her day!

Talon

You lose in lane against him, as jungler you can time his q with his wall dash, allowing you to yank him back to the lane before he goes over. Your q can reveal his invis.

Katarina

You can beat a Kat easily just predict where she's gonna go and you win! :)

Kassadin

His q can stop your e.

Teemo

His blind stops your q proc. Other wise you can win if you get a kill or two.

Singed

He can stop your jump.

Draven

His e can stop your e. Other wise you can easily displace Draven so he can't pick up his axes.

Syndra

She can really ruin your day! If you let her...

Lulu

Lulu can stop your dash mid air, i.e her ult and her poly.

Xin Zhao

Xin can time his r with your dash.

Diana

You can lose pretty hard to her in lane.

Xayah

You can easily outplay a ok Xayah, an insane Xayah can make you uninstall.

Alistar

His q and w can stop your dash.

Nunu's w can stop your jump!