(note these are ideas and not right or wrong answers)
It is natural to suppose that this will be about people in the city. The idea that the city inhabitant is a fox only comes in the last line and is quite a surprise!
I don’t think so for all the reasons above.
The poem seems to be about the problem of litter in the city.
I’m just not in the mood and I don’t do that any more tell us there is a first person subject.
This is called personification where something other than a human represents a person.
