Option to report boosters?

So I've come across a few boosters, sometimes on my team but most of the time against me. I know they are boosters because I checked their op.gg and there is no way somebody who was bronze for 2 seasons in a row can suddenly go on a 95% ranked W/R with PERFECT KDA in alot of games also before this winstreak they had a lose streak,playing support/top only and then suddenly swapping their flash keybind from F to D and only playing midlane winning 95% of games since then. But after the match all I can report is unsportsman?what category does boosting fall under?Cheating only mentions the use of third party programs which this isn't. Really annoying and unfair to everybody if boosters don't get punished...
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