In-game reporting system

May I suggest some form of in-game reporting to help deal with greifers/trolls/toxic players on the spot vs having to deal with it until the end of the game? Had a match that wasted my time with a top lane that wasn't in lane, stole everyone else's CS, cleared our JG's creatures from our JG, fed, wouldn't help in fights, ect. It's sad that the only thing we can do about this stuff is just take the punch, the lose, the demoralization, and then just report them. Something more should be done so that these types of players get stopped right away once they start acting up in such a way.

Maybe a system like early FF15 that requires all players (excluding the reported player) to agree on removing them from the current game, replace them with an AI with difficulty equivalent to the game's ranked level, and file a report on the player. I don't know, something like that, but it's unfair that people need to waste their time dealing with these people with the HOPE they get some sort of punishment.