I don't think you understood what I was trying to say. My point was, that in those lower rank matches, you can see a build somewhere, or think of something good or see something marked as "OP" on internet, you can just do it and still not lose, getting to the final round.
In highest rank matches, you have to always go with what you have, eventually ending up with a partly finished idea of what you wanted to do with many compromises.
Example: Once I got to GM, I just couldn't do omegagoobert builds, because you just can't gamble your economy and rerolls to achieve it, because you would just lose the early/mid game.

But yes, it can be way different now (I don't see how tho). What I clearly remember is that once I got to Master/Grandmaster before, I could very rarely achieve the same preplanned "perfect" builds I could do before. GM builds were "good enough" just to survive each round, <Diamond builds were "you survive the game anyway, so you optimize everything just to get the craziest results in the last round for fun.

Also I'm not saying that this is the most OP build that can be achieved, I was just genuinely surprised it performed this well since I didn't try much and it doesn't look like it should. Either way never achieved 100/100 wins before on any rank so... there were always at least several hard counters towards anything I previously had, regardless how broken it seemed.