Loads of people are complaining that the police aren't doing enough to stop the rioting, but god knows what else people want them to do?
If they do use violence against rioters they'd be accused of police brutality.
If they don't they get accused of not doing enough.
Right now there is violence erupting all around the city, and there is a finite number of police officers etc they can call on.
Tbh, considering how insane this all is I think they aren't coping too badly.
Anyone who blames the police for some idiot scum looting and vandalising needs to try thinking.