Try to decrease your champion people to 3-4 champions maximum, these champions needs to be either meta or have a good winrate.
I smurf alot in gold elo, and what I notice is people don't know how to close games when they are ahead, so I mainly play champions that can snowball in kills & can take towers fast and easy.
In gold I play:
Top Tryndamere (Secondary role)
Jungle Rengar (Autofill)
Mid Twisted fate (main role & champion)
Bot Kaisa (Autofill)
Supp Thresh (Autofill)
In this elo you should only count on yourself, take every little bit of exp/ gold etc.. to yourself.
And most important thing is /mute all.