Junglers like Jarvan and Lee Sin ganks give you limited choices at best and they're catch 22

Vi can also be put into this category but she's not AS bad as both Lee and Jarvan

From the moment these two hit level 3 and back to buy stalkers, they can gank away and easily force summoners. As a solo laner specifically, there's very few things you can do to avoid these ganks unless:

You have absurd mobility Absurd Disengage Absurd durability (which lets be honestly, early on nobody really meets this)

And if you're immobile, God have mercy on your soul.

There's almost nothing you can do about a Lee Sin or Jarvan ganking you with chilling smite. Even if Lee misses his Q or Jarvan misses his E/Q combo, they can still gap close to you, smite you, use their AoE slows and apply red buff slow on you. And you basically have to flash or use your mobility spell (if you didn't already use it to dodge their first spell) or you die.

They bring too much. They have a collection of damage, durability, mobility and are good at all stages of the game, more spefically Jarvan. Jarvan is literally one of the best scaling junglers who can go full tank and bring amazing utility or go full damage and 100-0 your carries. They have extremely low cooldowns and are extremely punishing to immobile champions. How Lee Sin and Jarvans level 1 ults aren't at least 140 second + CDs go beyond me because if your flash is down, you literally can't lane at all until it's back up or you see them somewhere else.

Bottom line is this: they are both extremely oppressive junglers that basically have this option: even when outplaying them, they still get on top of you early and take half your health (which can be just as harsh as dying because of the exp and cs you'll miss). And mid game, these two, next to Vi, have some of the absolute best ganks that are about as close as guarantee you can get to being sure fire kills. They need significant nerfs, nerfs to the CDs on their ults and probably have their early damage toned down. They literally pay no price for their mobility and it's why they are so overbearing and oppressive to play against.