Many high-level ranked players will tell you that ranked is a joke.
Why? It's pretty simple really. It's chock full of metagaming.
I'm not talking about the "meta" of builds. I'm talking about people who purposely take advantage of the game's rules to bend the game in their favor without explicitly cheating.
The Metagame, or game about the game, is any approach to a game that transcends or operates outside of the prescribed rules of the game, uses external factors to affect the game, or goes beyond the supposed limits or environment set by the game.
We already have one egregious example of metagaming built into the game itself, known as Duo Queue. You can pair yourself with another high skill player and coordinate with them over voice chat. This allows you to set up incredibly effective spikes or CC chains in an otherwise chaotic game mode. Or perhaps pair a highly effective combo (IE double herald) together. This sort of behavior allows people to bend the match in their favor without actually improving their gameplay.
But duo queue isn't the only form of metagaming. We've heard of most of the different forms it can take by now:
These sorts of behaviors ruin the quality of a competitive experience, because winning or losing can be determined by who's bending the rules more.
First, duo queue needs to be removed from solo queue. Either create it as its own separate ranked format (maybe group v. group), or eliminate it entirely.
Beyond that, there is no simple AI solution to these problems. While it is theoretically possible for AI to detect some of these behaviors (IE Queue Sniping/Botting), it cannot detect all of them.
What needs to happen is punishment for players found to bend the rules. This requires human intervention -- first to identify the behavior, and second to mete out a punishment. There also needs to be a sliding scale of punishment. Repeat offenders should see heavier punishments. Something like the following:
The great god Lagki demands sacrifice!