Unfortunately I recently got demoted to Gold 1. Good thing is that I went back to Plat 4 immediately within a day. It seems like my experiments are the cause of my downfall. I am constantly experimenting with better runes or builds that I forgot my basics.
I recently watched how a Challenger Tahm Kench Top One Trick (now D3 or D4 named Samuelz) and looked at his build via his match history. I found out that he had success on what my first strat was, "Win lane, Win Game". Simply dominate the top lane. No tricks, no shenanigans, just dominate using pure skill both micro and macro.
It is really good to go back to your basics when you're stuck. Played 7 games with Tahm and lost once. I did my old build with old runes and old strategy. I was surprised that it worked. Sometimes, less and simpler is better.