Failing an exam you didn't study for us not a failure of character. It's not your fault, and it is not worth valuing higher than your life.
Depression is telling you that you put too much weight on yourself. Do your best and that is already 100% of what you can give right now, and that is OK.
You need to vote for people that will PUT guillotines on the ballot! If there are none, find someone who will, or be the change you want to see.