He was a hitman and many professional killers tried to kill him before but they failed and now it seemed like he would be killed by some petty criminal and he cannot believe that. However he felt far worse for her because in his opinion he deserved to be killed for everything he did in the past and that woman never hurt anyone.
Yes, that ties it up much better. He was feeling bad for himself because an amateur was about to succeed where the pros had failed. (But much worse etc.)