I find a lot of match ups with zyra easy to picture in my head...
Zone Farm Poke Trade and win
Like really only if you mess up you'd lose a trade.
Or against a nuker. Which you tend to lose.
Fizz is probably the hardest lane IMO. Only thing is, you're much strong than Fizz until he gets 3 abilities, so you need to outlevel him early. Once he gets to level 3, he can't spam, he's mana starved. Try to chuck down your snare as he jumps as you, so you can trade back before he Es away. Go in and pressure/harass him after he's used his abilities. You have shorter CDs and longer range.
Veigar is difficult, until you get Merc treads. You're stronger than him early, he can kill you at level 6 so you need to play very careful, and rush those mercs.
LeBlanc is very difficult, however, there isn't much LeBlanc can do to stop you farming. You have the advantage at level 1-4, so try to establish your advantage during those early levels. Stay behind minions so LeBlanc is forced to trigger the sigil with W. When she goes W, return some damage with EQWW. If she goes all in, go EQWWR ignite on top of LeBlanc and you.