You are aggrieved that if you are being means tested for JA your savings will reduce the amount that you will get. In these circumstances, it does make financial sense to use your savings to pay off loans and mortgages anyway to reduce your weekly outgoings. It makes no sense to have loans and savings, especially when your income is low.
that is what savings are for - a rainy day.
The JA is very low, you may end up eroding your savings anyway just to get by. You will still be better off that people with larger loans to pay off. Its not like they will be getting thousands more in benefits than you are. You have done the right thing so far, be thankful for that, and proud of yourself, so you should work on getting over the bitterness that comes through your post, and be positive about the future.
Bitterness will erode your mental health, which is much more important that your savings.