Not of a matchmaking issue but rank system issue.
I come back after not playing for a long time (10 days) and my rank changed every other game, i went from oracle 1 to archon 6 and repeat multiple times, after some time i landed to low rank of archon 4. Since then i got really many games and all it give to me is just 2 ranks (from archon 4 to 6). Even now i'm still Archon 6 and just can't go back to Oracle.
I play most of the games with Party of 4 to 6 with different people, my party is either mid-high Phantom friends or Archon-Oracle friends (so my rank) and after multiple wins with both groups of friends, i still stay at archon 6. My winrate is 54% on Mo and Krill is 56%, Calico WR is 61% and yet i still can't rank up. Account ID (probably) 76561198852416318
Guys fix my matchmaking, 1day im almost ascendant 5 and another day im already phantom 4 in 2days im lost 25 games and won only 7, i playing et6 lobby and enjoying game. and next 2 days i cant enjoy game cuz my team feeding and feeding and feeding and feedint and ruining my games cuz its oracle lobby, but im ASCENDANT AND RECENTLY PLAYED ETTERNUS LOBBIES. LOOK AT SCREENS AND LOOK AT YAMATO IN MY TEAM TOP 12 AND SAME YAMATO IN NEXT GAME IS TOP1