If it's constantly a point of discussion then why has nothing been done?
Most premades aren't toxic, but you don't realize it because non-toxic premades usually don't ever make it known they are queue'd together.
I know because every game I look at my opponents runes/masteries using lolnexus. It also informs me when I am matched with or against a premade team.
his'll go on until you've gotten the hate out of your system,
It's not hate. If a large number of people didn't like an overpowered champion but a few people really enjoyed that champion it might be in the best interests, despite that small number of people, to nerf that champion.
This is the same situation except in reverse.
Premade teams negatively impact the experience of soloque players. They have a group-think attitude that blames soloque players for the mistakes of the game. They communicate less with soloque players. They do not get matched adequately via the MMR system.
The downvotes are our way of telling you that we've had this discussion, A LOT, and to just move on.
Not moving on. Premades are a problem.