well I would flame you for taking clarity on sona tbh ;D ok not flame, but make you rethink that choice hard. Then you do kind of sound like you are building some bizarre stuff on her. Go and read some basic guides, and ignore your team mates "suggestions".
Just lost 5 out of 6 games and got demoted undoing a weekend of hard work because I cannot catch a break with a team. At all. You know how it feels to lose a game to a kayle support who built AD because your jungler is an idiot, top lane "lags" and feeds and your mid lane first picked and got countered. Oh and they walk into baits when I tell them it's a bait twice and ping the map. 2 seconds later all 4 dead and they have the frigging nerve to act surprised.
Carrying as support os hard enough without people that i wouldn't even want on my team in a bloody ARAM game. I wish I had a button to just ban people that are clearly terrible and have no place in a competitive ranked game.
Yeah this is probably the nearest i have been to "angry" just because 2 or 3 idiots can systematically undo your progress. Hopefully I will return to teams with a tiny bit of common sense over the weekend, I know you shouldn't blame your team, and I'm trying hard not to, but when my score and play are fine, and even the enemy team honors me out of pity I had such a team...