He really IS....
He always sees the worst in everything:
e.g.
Me: "Hope you have fun at football club today"
DS "I won't - it'll be really boring and the coaches will be horrible, and I won't know anyone" (even though I told him his best friend is going)
And when he gets in a tizz about something he just won't listen - always keeps shouting, "no, but" and "it WON'T" or something similar.
He seems to have got himself into a habit of being angry and negative about everything and all the strategies I've tried don't seem to work