Girlfriends abusive Baby Daddy trying to take her kid away

Location: Nevada

I don’t know where else to post this and posting on a burner account for anonymity.

For context she does not have custody and he’s trying to remove all of her visitation days, not out of thought of her son (he does not care about him AT ALL) rather as a manipulation tactic.

My girlfriend’s abusive baby daddy is actively attempting to completely take her out of her son’s life. This has been happening for a few years now but the last couple of days he called CPS on her claiming she was a methhead and now she has to be drug tested. We know this is a manipulation tactic and while CPS found nothing wrong with living conditions they are actively investigating the incident. But the issue goes way deeper.
For one baby daddy does not care about the child. He has an obsession with my girlfriend despite being married with a daughter and uses her son as nothing more than a leverage tool. He was physically abusive to her in the past and started doing all this because we think he found out she started another relationship (4 years after they broke up)

She has enough text messages and other evidence to prove this but cannot afford a lawyer to properly fight this. Meanwhile The man’s mother (also an abuse victim but was unable to escape) happily pays for a lawyer whenever they have to go to court.
The big issue is her case worker and judge are refusing to hear her case over child support payments which have since been paid (and are now actively paid on time every time).

Is there anything we can do at all to fight this? We cannot afford a good lawyer and the ones we have don’t give a shit. (Her lawyer during the original hearing tried to win the case before trial even started which caused her to be confused on the actual court dates which is why she lost custody to begin with – because she no showed her trial unaware it was that day)

Any advice helps please