How do I control the game outcome more as support?

I've been finding that in many of my supp games where I don't play an AP support, it's extremely difficult to control game outcome. On a game when I'm playing an utility support like Thresh, I'll have used all three wards + control ward, have decent vision score, but team still keeps dying despite pings+lantern. I just feel at times that it's such a low impact role in silver if you don't play someone with damage. A lot of the time, what happens is my entire team will get picked off one by one and I'll be stuck trying to prevent them from taking inhib and acing us, or trying to clear superminions as a champ like Janna.

You get dogpiled on by mid+jg, people get mad at you for things you can't control, and they ignore vision+walk out of redemption. My friends have all been advising me to switch to a role where I'll have more impact (Jg, mid or top) but considering the fact that there have been support mains who've solo queued out of silver, I'd like some advice on how to do it.