The problem with the "men's rights" movement is not that men still don't face injustices--they are more likely to be the victims of violence, more likely to commit suicide, more likely to face longer prison time for committing the same crimes, face stigma in careers like nursing and elementary education, and are liable to face stigma and even mockery for being raped, especially if they were raped in prison.
The problem with the "men's rights" movement is that it has chosen to blame all of these injustices on feminism, and spends far more time attacking feminist causes than actually helping men.
Snowstalker actually made a very good point.
These movements are really quite sad. I find it hard to imagine any of these people having a close and intimate relationship with a woman (doesn't even have to be a sexual relationship). It seems like it'd be hard to uphold all these ideas if one does.