Scared of boyfriend's mother, but really want to cuss her out

The title says it all. She acts like she's doing everything to help him, she tells me this isn't how I raised him, but guess what hahaha hah hahaha he basically raised himself while you worked all the time and left him with an abusive house where he was physically/verbally/sexually abused.

I could write a whole book about this shitty woman and all of the terrible things that has happened to my boyfriend.

I'm the only one (I kid you not) that cares so much. I've been there through everything in the past 4 years. I'm his rock and he is mine. It hurts that I can't be there to get him out of this horrible living situation.

Does anyone else have a SO that they just want to help so badly, but can't do anything because of the distance?