Sona's a bad support?
I don't know exactly why people think Sona's a sucky support, I do real well with her, I typically get the following score range,
2-5 kills (mostly in team fights)
1-5 deaths
18-25 assists
I seriously don't get where she's bad, is it just because people don't know how she works or something?
, her E is a great escape tool for your team, and her R is a wide stun (and to be honest longer and much wider than reworked Taric's E). Even without her E she still has great mobility, and even though her statistics aren't the greatest in general, they fit well with her kit with how versatile and oppressive it is. I'd say the only reason you'd be dying a lot (other than a counterpick) is because your team isn't acknowledging that you're getting ganked a lot (because you're Sona and they don't want you or your Bot to survive to snowball on them).