Your particular job is not your identity - it doesn't have any bearing on your higher sense of self. If you were GREAT at it - that doesn't make your identity (sense of self) greater or more valuable/important. Similarly, if you were NOT GOOD at it - that doesn't make your identity (sense of self) any lesser, or less valuable. It's all too easy to allow our sense of who we are to become entangled in activities and experiences that really have no real bearing on it...

You said, "I became the joke around my work place same way I became the joke around my family and people I know"... It sounds like you are re-living a 'dynamic' in your workplace (current circumstances) that was previously present in other areas of your life and from earlier life experience. You are NOT a 'joke' - but your experience of these feelings of being a 'joke' is of course real... It's an observable phenomenon that individuals tend to be drawn to life situations and circumstances that will activate and stimulate unresolved emotional energy (baggage) that is stored and held onto within them... It doesn't surprise me that you found yourself in a work environement that is influencing you to feel something inside you that you previously had a history with and are familiar with. The message coming from the Universe is one along the lines of, "Now it's time for you to confront, acknowledge, and process these challenging emotions from your past"... If you could have healed this at an earlier time in your life - that would have unfoled and transpired. It didn't happen at an earlier time, because you weren't ready to go through that yet. These things will keep resurfacing until you courageously allow yourself to endure through the challenging healing process - so you can eventually liberate yourself. Don't view the current circumstances as a 'threat' to who you are - look at them as an important opportunity to facilitate growth and healing!

P.S. - I can literally think of thousands of jobs that I would perform poorly at! We cannot measure our worth/value by our ability to perform any particular type of job. No sense in that - so pull back from any such thinking/thoughts....