https://playvalorant.com/en-us/news/dev/thank-you-from-our-dev-team/

DATA OPS

This year, we had the opportunity to build the new Smurf Detection system that is now live across all regions! It was awesome seeing the community react to these new features and have already seen a substantial decrease in the number of unfair matches that happen because of Smurfs. Next year, we will be releasing our 2nd version of Smurf Detection that will make our automated detection faster and more accurate (no Smurfs slipping through the cracks). Thank you all for being patient as we continue to improve this system to ensure you have fair and competitive matches when you play VALORANT! 

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[I think I missed the patch notes where this was introduced. Was it effective?] (BTW I am fishing for drama)