Guild Wars 2

hi everyone i was wondering if anyone knew how match making works? i ask because in ranked i have ended up in a few teams that have no idea what to do. i am talking fighting off points,zergging and sometime 2-3 people go to home at start. however i do not get teams like that has often has i do in unranked. i thought ranked would be a lot different then unranked in terms of knowing the maps and how to play

You get match with player with your MMR,its start of the season so that literally everyone atm

Is your MMR impacted by your personal score in a match? Ie. if my team is obviously going to loose is it everyone for themselves to get individual score increases?