Lmao during season 2 I played so shitty so I was low silver. Around the time you could stack black cleavers in season 3, I started using the LoL reddits and followed the METAS strictly.
I kept on increasing in rank and now I may only be gold 3 but............
seriously if you aren't diamond or high platinum following the META helps you improve immensely because RIOT enforces the meta with an iron hand whether you like it or not.
Unless you are playing some strong or god tier champion there is always a better champion that you could be playing to climb the ranks.