Seeing as you've already hit gold 5 ima guess that you already learned what it takes to climb and perhaps forgot how you got there..
1.Causing tension between teammates isn't going to help you win the game, so keep your comments to yourself. People are short fused and will throw a game if you tip them the wrong way..
2.You can only control yourself. Play a champion(s) you are extremely comfortable on to get back into the groove. Try to control the game yourself by getting ahead on a champion you know how to close a game out with. Its better to have comfort picks in ranked than have a large champion pool.
The biggest thing is number 2.. because if you are focusing on what YOU can do to help your team win, then you dont waste time and break focus worrying about/pointing the finger, at teammates. Believe it or not, when you start counting and pointing out all ur teammates mistakes, you actually hinder your own carry potential for the game. (aside from putting your teammate on tilt)
TLDR Lock in your fav champs, get zoned in, locked in, focused w.e u wana call it. Dont worry about your teammates suckin bricks, and just keep asking yourself "what do i need to do to carry these guys"
Idk this is what helped me climb from silver 3 to gold 1 last season... and quite frankly wen i started doing just this i climbed pretty quickly. I'm guessing to an extent you've done the same being gold 5.