Use of phrasal verbs: A terrible day in the office

That day of John's was terrible. (Or say this: John's day was terrible) When he went into his office, he discovered that the Board of Directors wanted to do without of him and that he was destined for had to find another job. So he saw the dream of a his life came come apart, and the work that he always dreamed of doing was thus given to another technician. He bawled out his boss, because he backed out their agreement and did not take his defense.
While he went down the stairs, he perceived that heard one stupid colleague laugh and pick on him. In a first moment At first, John tried to brush him off, but then he turned around and said him something of little nice not nice, making understand him which made him understand (getting across to him?) that he was only a poor asshole.
Disappointed, he left the office and went back at home.

Good job! I wasn't sure how you wanted to say some things, so I changed it to what I thought sounded right.

This is the corrected story:

John's day was terrible. When he went into his office, he discovered that the Board of Directors wanted to do without him and that he had to find another job. So he saw the dream of his life come apart, and the work that he always dreamed of doing was thus given to another technician. While he went down the stairs, he heard one stupid colleague laugh and pick on him. At first, John tried to brush him off, but then he turned around and said something not nice, which made him understand that he was only a poor asshole. Disappointed, he left the office and went back home.