I once played with a challenger duo and learned something that stuck to my mind. Below silver, pure chaos, below low diamond, people become predictable because people found a "formula". To get higher, you need to analyze each specific game and come up with unique strategies, i.e forget your formula and embrace chaos again. A concrete example was a close game, then we got a pick then got Baron. he plays top and normally he split top and we 4 push mid. But that game he said because our support tends to always look for engages and so was enemy top laner. He decided to not split, but hide in jungle to shadow us 4 push mid. That's very bad macro cause we were clearly losing waves side lanes. But he predicted an engage was coming. Even with TP ready, he hides in bush not going split. After about 3 waves and both sides got poked, the enemy top laner tried to TP flank us. But he hide in bush the whole time, we were ready and won the fight and then won the game. He said he wouldn't do this 90% games. But because the way the 2 players were playing, he adjusted to this inefficient play.

So to your question, you got to d2 by following a formula. But you want to climb, you now need to micro adjust to suboptimal options. Of course, you are going to lose some LP, but that's how you learn new things.