Will and Jada Smith are upset because HE didn't receive a nomination this year for Concussion.
Said time and time again not to pay attention to public figures using the words "WE" and "US" to manipulate people.
We see it happening in politics, but it happens with entertainers as well.
I'd imagine that Will is especially mad at himself for bending over backwards to show the world how "open minded" he is by letting his teen son wear dresses in fashion ads and STILL not getting the pat on the head from the Academy.

Figuratively sacrificed his son to Golem for NOTHING.