No, I don't think so. There's no mention in the text that it was actually hard to get rid of the roaches. It seems that he or she is describing what the roaches were like. They were beggars that needed to be exterminated.
"Right" in this context means the following:
Source: Longman Dictionary of Contemporary English8 emphasis [ only before noun ] British English spoken used to emphasize how bad someone or something is SYN total , complete : He sounds like a right idiot!
The house was in a right mess when we got back.