In my case I would say yes since in every case they have tried to come back to me (even a decade later) and I have been able to reject their attempts.

Nope.

One did

Life ain't like the movies, so unfortunately most of them don't

I never go back and look, I trust Karma to do its work.

No. They are not even remorseful.
It makes me wonder if karma, especially the theory around bad karma is fundamentally flawed.

No such thing as karma.

No. 😑