I'd say at least 75%+ of my losses are from the enemy jungler outjungling my jungler

And maybe only 25% from laners getting outlaned.

Why should just 1 role have just a huge impact on the game? The jungle nerfs did nothing, junglers can still farm their entire jungle and gank every lane. Junglers can straight up 1 v 1 anybody for the vast majority of the game with red smite and red buff. It doesn't matter if you yourself play safe when theres 3 lanes and all the jungler has to do is get a single kill off of one of them and snowball. Plants just make it worse when junglers see your wards (or lack of wards), stay healthier, and straight up make more invade and ganking plays. And if the jungler really wants to screw your lane, there's nothing you can do about it without your jungler. He's just going to sweep your ward, then go farm his jungle or sit in the bush. You have no choice but to get zoned from cs and you can't go out and ward because its too risky. Their jungler can literally afk farm his entire jungle while you have to sit back and get zoned because vision denial is so free. It's literally impossible to always have the lane shoved towards you when all the enemy laner has to do is shove his wave and let the wave rebound towards him. There's literally no counter play or trade off against junglers except hoping your jungler does something.

This is different than when supports roam mid to gank, or mid laners roam bot to gank. Supports are making their lane a temporary 1 v 2 and the mid laner loses a ton of cs and exp, so failing is actually punishing. Junglers can still fail all the ganks they want and still be ahead.