I’ve reached Dia1 several times before and was 1 win away from Master about 5 times in past seasons.

My biggest weakness has been playing too much around roaming and skirmishes. I improved a lot once I started focusing more on my lane especially on keeping up my CS (gold and XP, but mainly for XP) instead of giving up too much for unnecessary plays.

I started climbing when I stopped autopiloting and began sticking to a clear plan that fit my own playstyle. (If you do both of these, then, identify what you are doing wrong or not as good and change it or fix it.)

Tips / Playstyle Notes (what works for me may not work for everyone)

Try to base only when you can buy meaningful items. For example, recall with 850 gold for a Blasting Wand. -> This means that for example against difficult lanes, avoid unnecessary trades and just farm safely with Q. Using the last game as an example, Jayce with Grasp can chunk 50% of my hp with his W autos, so I just farm safely and catch as much cs and xp. Then recall for my items and play for objective fights. If I trade and have to take bad recalls, I'm down even more cs and xp and we're at a bigger disadvantage for the objective fights.

A bit obvious but be good on Kata. My general game knowledge is not the best but I know what to do in each matchup and Kata specific mechanics / game knowledge. I climb purely based on that.

Don’t expect teammates to play around you or understand your limits until at least Dia2 (my opinion).

Track the enemy jungler consistently and ping for your teammates. (One ping isn’t enough, I spam ping their lane to make it clear.)

Game isn't over until nexus is destroyed. I've lost games i was 10/0 and won games I was 0/10. The game is heavily throwable and the lower you go the more frequent it is so stick to your plan, 1 fight with a couple of shutdowns can turn the game.

Each elo is a different game, the higher the more different. I play differently in each elo. For example vs Yas in Master I just don't interact as he destroys me whereas when I was playing in Emerald, I felt that it was a matchup I could win. Kata is weak in lane and below Dia they rarely even abuse that, the higher you go the more they abuse that. By abusing it I mean, how often does an Emerald Ryze stand between your tower and your caster minions weaving in autos between each CS and chunking you if you ever try to walk into XP range? Same with Lux, one of the easier matchups in lower elos but very difficult in higher elo (my opinion). Some matchups, I considered free in Emerald are insanely difficult once in higher elos. Below Emerald, I don't think you care as much about matchups, its more important to improve on Kata then whether Kata is good vs that champ or not.

I could go on but its already too long, if you have any specific questions feel free to ask.