Guild Wars 2

Hello. Could you explain how the player selection system works? Feels like the first few matches I get into the team with experienced players and we win, and then there is a series of defeats in the team with players who have neither a title nor a guild and they play as the first time. After 3-5 losses, I again get to experienced players. And these seesaw are too constant to be considered an accident.
  I just can’t believe that these players are of the same level. Is there any MMR in general?

+1
Same here. This sistem is killing me.