Well there are no "good" characters in this film so how would one add a positive portrayal of blacks? Maybe "Pat" could have also been black but he's an ex-bomber turned paranoid junkie.
I think the character traits were what they were because the story doesn't work otherwise. I don't think it was PTA's express intention to showcase negative black stereotypes.
You're more intent defending PTA than trying to speak to the actual review's sentiment, so I assume there's some personal hangup there.
You're not a bad person for liking flawed media, but making flawed arguments to try and blank Black people and their reception crosses into it for sure.
I think the character traits were what they were because the story doesn't work otherwise. I don't think it was PTA's express intention to showcase negative black stereotypes.