Try this in cell A1, deleting everything else in the 'Wall of Shame' sheet:
=arrayformula(
query({"Department"\"Activity"\"Owner"\"Deadline"\"Date open"\"Overdue, days";
query({
flatten(split(rept("|"&Overview!A2:A;columns(query(iferror(split(flatten(trim(query(transpose(if(Overview!F2:AA="Open";if(Overview!F1:AA1<=today();Overview!F$1:AA$1;);));"";9^9)));" "););"";0)));"|"))\
flatten(split(rept("|"&Overview!B2:B;columns(query(iferror(split(flatten(trim(query(transpose(if(Overview!F2:AA="Open";if(Overview!F1:AA1<=today();Overview!F$1:AA$1;);));"";9^9)));" "););"";0)));"|"))\
flatten(split(rept("|"&Overview!C2:C;columns(query(iferror(split(flatten(trim(query(transpose(if(Overview!F2:AA="Open";if(Overview!F1:AA1<=today();Overview!F$1:AA$1;);));"";9^9)));" "););"";0)));"|"))\
flatten(split(rept("|"&Overview!E2:E;columns(query(iferror(split(flatten(trim(query(transpose(if(Overview!F2:AA="Open";if(Overview!F1:AA1<=today();Overview!F$1:AA$1;);));"";9^9)));" "););"";0)));"|"))\
flatten(query(iferror(split(flatten(trim(query(transpose(if(Overview!F2:AA="Open";if(Overview!F1:AA1<=today();Overview!F$1:AA$1;);));"";9^9)));" "););"";0))\
if(flatten(query(iferror(split(flatten(trim(query(transpose(if(Overview!F2:AA="Open";if(Overview!F1:AA1<=today();Overview!F$1:AA$1;);));"";9^9)));" "););"";0))<>"";today()-flatten(query(iferror(split(flatten(trim(query(transpose(if(Overview!F2:AA="Open";if(Overview!F1:AA1<=today();Overview!F$1:AA$1;);));"";9^9)));" "););"";0));)
};"where Col6 is not null ";0)};
"select Col1,Col2,Col3,Col4,Col5,Col6";1))
I've put the whole thing in a query so you can decide which columns you want to select, ie, you could adapt to select Col1,Col2,Col3,Col4,Col6