It is true that I am going to end up as a failure.
Why do you think you're going to be a failure?
There's a lot of reasons for this, I discovered that I suck at everything, I always fail and I'm dumb.
There's no way you suck at everything, so stop thinking so because it's damaging to your self-esteem. You should always evaluate your strengths and weaknesses, but instead of dwelling on your mistakes or flaws, you should try to work on them.
No one is going to be a psychiatrist for me.
It might help to talk it out though about your feelings and why you feel like you do. It's wrong to think of yourself as a failure. It's good that you can acknowledge if you are doing something wrong so you can work to improve it.