As someone who only played PvE so far, I´m sure everyone could crush me in PvP-maps regardles of my CR.
Of course its a bit frightening to face a CR55, but maybe its his very first time on this mode/map and he´ll die more often than you might think.
PS: As far as I know CR/matchmaking issues were adressed ALOT here in the forums and the devs keep a close eye onto it. That it was changed fro CTT to Beta and changed again to release is a clear hint that the devs are not satisfied with the status quo as well.
I heared that K:D ratio could be a parameter for matchmaking, but I´m not sure that this is more than a rumor.

