"No Matter What I Do I Cannot Seem to Get Better"
A lot of people struggle to improve their performance in the game. I will point out a few reasons you aren't improving and a few tips to help you boost your performance drastically within a few days, if not a few games.
Reasons You Are Not Good
Apathy/Lack of Motivation
If you really wanted to get better at this game, you would try very hard. You want to carry, you want to dominate, you want to win the game pre 30 mins, but you don't try hard enough; or maybe you don't want it badly enough.
Negative Attitude
If you stay negative/salty/tilted, you will NOT be better. You will start to play worse and worse, and you will just play the same no matter how much you play this game.
Not a Team Player
Are you one of those hero wanna-be's that ends up making some of the dumbest plays in the history of league of legends? Or even if you don't, if you like to solo and neglect your teammates, you won't win games.
What Should I Do?
Spectating High Elo Players
When I used to be in bronze, that helped me get out of bronze supeeeer fast. You don't have to watch streamers (although I did) because you can just watch the games on your league client homepage.
Having Positive Mentality
If you don't know what it is to have a positive mentality, go work out. Lift weights, sprint, jump, exercise and figure out what it means to stay positive in times of plateus, pain, struggle, soreness, and etc..
On the other hand, if you do know about positive mentality, be positive and even when you are losing, stay positive. Almost every losing game can be win-able if you try hard enough and maintain that positive mentality.
Playing With High Elo Players
This only applies to those who have higher elo friends that they can play with. Play with them, and even if you lose badly, don't be embarrassed or depressed and try to learn from them. You would want to to this right after watching high elo players play.
In Closing
Feel free to add things that you guys have experienced to be true. And as always Have Fun and Good Luck :D