How to win at league
TAKE BREAKS
It is so easy, play a little take a break play some more take another break, and if you really want to climb take long breaks. I have had an account on LoL for years and out of those years I have maybe played 6 months total.
I started out in low silver climbed as high as i could until I started raging and then took a break for a year. Then I started playing again and got into gold climbed as high as I could until I started raging again and took a break. Now I started again in december and got into plat.
Another tip for if you want to climb, play a lot of support. Like my favourite streamer aphromoo once said:"support is so easy!". If you believe playing support is boring then play AP supports like Brand, Karma, Zyra, ... I love poking the adc out of lane as Sona so my adc can farm easy or play Soraka (no she's not a poke support) but she is really fun. Just watch the other adc try to kill your adc as you heal him for 3 times his hp bar and spam that mastery emote as the other adc tries to last hit minions under tower but you keep healing them.
If anyone has any qeustions please ask them and I will try to answer them to the best of my knowledge. I'm not a great player but I do have one thing that many players dont have FUN while playing this game. It's a game, games are supposed to be fun if you are not having fun just dont play!
tl;dr LoL is so easy just dont play when you are frustrated or raging and take as many breaks as you need!