You say your purpose is to help others? You do that here you know! But if you want to do more why don't you sign up to a college course for counselling or something? You don't like your current job, you get some kind of qualification in helping others and use that to find a more worthwhile job that you would enjoy.
You wanted to make yourself better and make improvements throughout this whole year if I remember your previous post correctly. It's only 5th January...you have so much time to make changes. It would be foolish to give up now!
Hang in there tigers, you're worth it