Check for borer holes on those dead entire branches. I doubt that shrub will live another year.

Dax

its yellow color indicates it chlorotic .... doesnt it???

i see a slight swale behind it... so i woulndt assume the growing conditions are equal ...

but with older fully established plants.. i doubt it makes any difference. ..

it could be girdling roots... i guess you wont know until you dig it up.. if you are that interested .... i would just cut it flush with the ground and walk away ..

i would be done with it ... i surely wouldnt want a 5 year rehabilitation project.. which will probably fail .. right outside those beautiful windows.. where i would have to look at it every single day .... it might be another story if it were out behind the garage.. and i only had to look at it twice a year

good luck

ken