Some little random tips to gain elo
stop playing champions you cant play or suck with just be smart about your picks. Example every time there is a lb in my game they have 100 cs at 30 min and do absolutely nothing. They either do really good and get a lead off kills or they just go even and do nothing. Same with jax players dont play jax if you are low elo you dont know what you are doing and you are going to get hashinshined all game and nobody wants to be that.
Also dont duo if you suck as well you just make the games harder. Example the lb and jax in my last game 40% kill contribution both utter useless while I have 69% and most damage as a basically full tank jungler. For a reference they did as much dmg on carries as their support morgana. If you cant do damage in your games go to op.gg look at your damage every game if you are playing carry champions and you have 0 damage its probably why you are losing all your games and you should try to either play non carry roles or more utility champions. On the other hand if you are always doing the most damage play carry junglers or carry midlaners because you can obvoiusly win your lane. too many players try to play stuff like cait and get dumpstered in lane when they have the biggest lane bully. When that happens lose a little pride put down the champion knowledge you suck and just play other stuff gain some elo.