Ugly side of Milan

Milan is not a beautiful city although there are beautiful parts to it.  I try to temper my response to things by saying..."what an interesting building"  but David's response was on the mark yesterday..."What an ugly building". 

I would not want to live on the corners in the upper part of this building!

Another ugly part of Milan is the graffiti.  Its everywhere.  I don't understand why.  Why don't owners clean it up?  Why do people put it on buildings, tram signs, park benches, everywhere in the first place?