Never. You were brought in to be captive slaves.
If you think the US gov’t is going to give you your freedom via green cards, you are delusional.
And how can you be “working here from decades” when you’re supposed to be temporary guest workers with visas of 6 years max?
Doesn’t sound too “temporary” to us.
If you don’t like H-1B “slavery” in America, go clean toilets in India.