She only has one 'character' as they say. And it is the same role that made Whoopie Goldberg famous. These were always the one out, smartalec, streetwise, wise cracking, strong Black woman, who has to guide the stupid, oblivious, lost White girls as to what life is all about. It is a tired role these days that doesn't play very well anymore. You only had one job! Unfortunately that job is gone now.
Eddie Murphy was the Black male version of this same idea. The smartass, street cool, Black dude, who has to show those stupid White boys what it is all about. But at least his stand-up was more or less good.
With both Whoopie and Sykes, their stand-up routine has degenerated into vile, vulgar, vitriol, aimed at America and White people in general. It is more mean and hateful than it is anything close to being 'funny'.