There is no “backlog”. These people were supposed to be temporary.
Under US law it’s a federal crime to break into America on a temporary work visa with intent to immigrate.
But millions of these looters from India have done just that. Silicon Valley is now occupied and stolen by them.
The USCIS doesn’t want to process your illegal green card applications because you’re all inadmissible aliens who are working here illegally.
You agreed to leave the US when your work visas were over – not stay here forever and break our laws.
Doesn’t matter if you’ve worked here 100 years – you are still breaking our laws and are inadmissible. Length of crime spree doesn’t entitle you to a green card.