Hello! I am Bronze.
But does that mean I don't know what I mean? (Probably)
But I do know that Jax is still a massive hyper carry if played properly.
Any good Jax player can tell you that he has solo carried a game he should have lost.
And I'm here to teach you why this champion is God Tier and how to play him!

Always use your (W) to proc Trinity force, use your (Q) to hop to a ward, ally, or enemy. Use your (E) if you see an ADC focusing you, a fed top laner, or any auto attack reliant champ. Use your (R) in the start of a team fight, so that if they decide to focus you, you are more resilient.

Almost everything you need to know is in the notes. Read them and prosper!