Can they though? Hasn’t the government already ignored plenty of injunctions against them?

And will they? This administration has appointed a significant fraction of judges.

Do you have some examples?

If you have enough money to hire lawyers or can figure out how to get in contact with a law firm willing to work with you for the exposure, sure.

If you aren’t lucky enough, you’re just screwed.

It's not that bad because once the court ultimately makes a general ruling, not merely in favor of an individual, but against a federal policy, the ruling can apply to everyone, not just to that one individual. Granted, the government could still ignore the court's order.

no. the supreme Court got rid of that last year

[citation needed]

This government and its supporters would say - Due process isn't applicable to everyone in the US especially who they perceive as being "illegal immigrant".