Ruin is NOT a requirement
As the title says, it really isn't needed for red ranks. Sure you'll have more time and in turn makes games more bearable but you can do fine without it.
Let's take both otz and tru3 into this. They both did a viability test. Tru3 had ruin and he went for specifically pipping or double pipping. That's precisely what he achieved but in a good portion of those games ruin went out relatively quickly.
In otz video he didn't use ruin and used a poor early game killer. He didn't depip once out of his 16 games and only used browns and yellows for addons. He didn't go for the 4k but he went for his personal idea of a win. In both sides neither one depipped once and they both felt like they "won" so this is why i feel ruin is not needed for highranks.
Edit: by not needed i mean not needed to stay in red ranks