Jax's Design feels Outdated and Unhealthy
Just the design of "if I survive until late game you will lose" feels very unfair to play against. All 3 of your lanes can get fed and you can dominate early to mid, but Jax will still just endlessly splitpush and take down your nexus before you can even recall. Fighting a Jax also feels very one sided, he just sticks to a target and that poor target really can't do anything. In a fight, no matter the numbers on either side, Jax will get one kill.
I think this is just the result of being a very old champion. Maybe for a good nerf they could lower how well he pushes towers making him actually have to fight every now and then, but I think he needs a complete gameplay rework.
Just because you FEEL like Jax is the strongest doesnt mean he is. That's like back in the day when someone said Ekko was the best tank on the planet, and I turned that around and played Tank Akali and solo a whole team. (with video footage).