When no one expects anything from us, it can causes frustration, depression, and pain, because many human beings need to feel that they are important, useful, and interesting. We need to feel that we are good people, because this gives us a reason for our existence.
     What happens when people have low expectations of us? We do not want to be in this position, because our self esteem may be affected. Something interesting about underestimated people is that they are not under pressure, and no one sees them. They may feel "invisible," and this "invisibility" may give them a feeling of strength.
     Incredibly fantastic stories come from underestimated people. Certainly; they are called "fantastic" because nothing is expected from them. When Susan Boyle first appeared on the "Britain’s Got Talent" television show, her extraordinary singing voice surprised all, but the bigger surprise was that no one expected her to have such talent because of her physical appearence.
     We cannot control people underestimating us; that is impossible. What we can control are our attitudes as we confront our insecurities. What people think of us and what we think of ourselves are two different things.

     Try not to write in the third person. Use less adverbs and adjectives. Otherwise an interesting read. Thank you. 
     -- Dan 

When no one expects anything from you

When no one expects anything from you, it can causes to you frustration and depression to the point of pain because, as human beings, we need to feel that we are important, useful, and interesting; that is to say we need to feel that we are good for “something”. This is completely logical because this gives meaning to our existence.

But what happens when people have very low expectations of you? Well, surely nobody wants to be in this position because surely our self-esteem will be seriously affected. However, there is something interesting something about underestimated people, and it is that they are not under any pressure; nobody sees them; they are “invisible” and that “invisibility” makes them much stronger people.

Even incredible and fantastic stories come from underestimated people and certainly the fact that they are fantastic is (because? - check meaning) nobody expects anything from them. When Susan Boyle had her first appeared on "Britain’s Got Talent", she surprised us all. But, beyond of her extraordinary voice, the biggest surprise was that no-one believed that a person like her, with her appearance, could have such talent. (I think you mean that the surprise was her talent not the opinion)

I think we cannot control the fact that people underestimate us: that is impossible.  What we can control, however, is our mind and face up to our insecurities. One thing is what people think about you and another thing is what you think of yourself.

Very good.  Only a few mistakes. Check my punctuation corrections.  It is worth taking some more time to study the use of English punctuation because you already write well. Kind regards, Michael