How to not improve at the game and get stuck at an elo or lose elo.

1. Always blame your team
2. Do not look for counterplay
3. Incessantly complain about a champion being overpowered
4. No seriously always blame your team
5. Be toxic. Tilted teammates mean that you have a greater chance of losing
6. Never change your playstyle
7. Don't learn how to counterbuild
8. Focus on kills and ignore objectives/cs
9. Continue to play aggressive in lane after you have repeatedly died
10. When in doubt about who to blame, blame the support and or jungler

If you follow these 10 tips you should have an easy time decreasing in elo, ruining games for other players, and every so slowly decreasing your average KDA.