>> The blooms just don't look like real roses to me and don't smell good
I've been thinking that for a few years now. A prior owner planted some real roses under trees, in deep shade, and they are just black-spot-on-a-stick. But at least the few blooms per years are ROSES.
And now that I know my Knockout has wide-ranging roots, maybe I know why plants near it did not do well at all.