It's crude to use a request for help with an abusive relationship as a political soapbox.
The girlfriend is abusive, and the writer probably figured that out while writing the letter. It's tough to get out of relationships in general, but emotionally destructive relationships can be even harder because you've been isolated from the people who would normally be supporting you.
If you need someone to talk to, to get started, get to a safe place and call a domestic abuse helpline. If you're worried that your girlfriend may look at your phone records, call from another phone (maybe your work has a land line). http://www.dahmw.org/
showed up on a Google Search, I don't know if they're any good, but it might be a start.