Looking to improve in ranked (and avoid further demotion)
I am a LoL player that has played on and off since the beginning of 2012, and I feel like my skills are degrading over time as I have been demoted several times already and dove into a massive losing streak. I have been dropped to Bronze IV (2 times demoted), and I want to know how to improve my gameplay in any aspect. It is demoralizing to continue playing and to feel like you cannot improve after such a long career in LoL.
Can someone provide advice to do better and prevent such a losing streak?
Here is my op.gg profile (the win ratio might make you disappointed)