I don't think it's misleading. It's clearly a population chart, not a count of newly issued visas.
It's misleading because it says "The H-1B program grew...", which to many implies that it was doing more immigration. It wasn't. There was less naturalization.
No it isn’t. It’s more like a rolling cumulative chart of all the prior years’ H1Bs combined.
Only if there is another line of "new green card holder previously holding H1B visa" which is expected to show exactly the opposite trend.
You still don't understand the problem here.