@magelan, as someone who has an idea of how hard this particular struggle is, I'm really pleased to hear how well these meditations help you feel more comfortable with yourself.
Anger is hard, because in several senses if you have a disability,, you have a right to be angry, because no, it's not fair, indeed the same could be true of abuse though myself I've never actually managed to feel anger about that (which is odd). Still sometimes anger is unnavoidable, and occasionally there are emotions or actiosn related to anger I've found useful in the past.
This morning I tripped, putting my foot in a pothole on the pavement. it was nobody's fault accept perhaps mine. I got angry, I swore, I shouted at the bloody sodding pothole!
A lady asked if I was okay, I responded that no I wasn't thanks to the stupid bloody hole in the dam road, but i would be in a minute.
I think she was a little disconcerted, however if I hadn't! sworn so much, I'd have just been walkign along, feeling the pain in my ancle, feeling that grey knot of generalized resentment, and I've have likely been much more unpleasant to the next person I met. By expressing my pain and yes, irritation in this way however, I was able to focus it on the right thing, the inanimate pothole, which has no feelings to hurt, no harm to be done, and is far better than letting my anger sit around and then expressing it at myself in the course of several hours or even days, or still worse at another person.
Then, there is anger and determination, letting anger over a different thing actually fuel other efforts instead, be determined not! to just! be your own disabilities or others perceptions.
The problem however is leaving anger at that, since there are far too many other negative forms of anger, jealousy, resentment etc.
One thing I'm trying to practice is more healthy methods for dealing with anger, and yelling at potholes, odd as that sounds is actually one of them.