PR difference resisting to move forward.

In the Underground Rivals, It is not fair to have a high PR user to race with a lower PR user. For example My Car's PR was 650 while being on Rank C, however when I select to race I get to race with a rank B user with a PR of 700+.

To limit this you can sort the opponent user with a ±20 PR. That's still acceptable. While also checking on the rank. As I mentioned I got to race a Rank B user when I was in rank C.

At a certain point it is just impossible to go beyond rank B. Another example, if you see my race history all I've been doing is race a 'Nissan GTR BNR32'  which has a higher PR than any other eligible cars. Please suggest how do I get past that level when there are no other competitors. Is this a glitch or the technicians have made the game like this. It is really unfair how the things are turning out to be.