8 Straight losses in ranked...Help?

Basically I am just writing this to get some help on winning... I have been playing League on and off since 2010, gold since 2012 (currently high silver and climbing) and the meta has changed so many times that game play is always changing.
I am still stuck in the 2010-2012 version of the game (I was most active then) where it was all about individual performance to carry a team, but now league is MUCH more team based than ever before.
After losing 8 straight games as Syndra mid (my best champion) I want to know what I can do better for my team because even though I lost my last 8 games, my average KDA + creeps/game is 7.5/6.9/4/5 with 236 CS/game (This KDA is lower than my average due to all of these games being losses).
Thanks,
OG Chachi NA server