How does mmr work? having some strange matches
So, i was keeping track of my "elo" through this site and my mmr was at 1379- 60W/60L ( a few days ago) I noticed however that the games did get harder.. but very one sided.. like 2 games ago i had no level 30's on my team.. and a Plat 2 yasuo on the other team. of course level 30. The top laner on my team was brand new to the game and got wrecked. I was messing around with supp panth haha and still managed to kill yas and keep a good kda. But ya we got wrecked ofc. The very next game seem very similar. I was by far the best i smashed my lane but every other lane got wrecked. I even lane swapped and killed the fed nasus ( he went mid for some reason) And its liek i can tell just by watching a player if hes high elo and after game i always check. Im often right. SO, im actually not complaining just kind of curious. I mean is it 100% random and im getting unlucky?? OR am i winning some games vs good players so riot thinks im better then i am and places me with differant players?