How does the RR rollback system make sense when you lose -19 RR to a cheater and only get +10 back?

Hey everyone,

I recently received an in-game notification informing me that a cheater from one of my past ranked matches was banned. During that specific game, my team took a heavy loss against the cheater, resulting in a loss of -19 RR as well as a hit to my hidden MMR.

When Vanguard processed the ban and granted the RR refund, I was surprised to see that I was only given +10 RR back.

I want to open a discussion on why the system operates this way, because from a player perspective, it feels entirely unfair for several reasons:

• Net Loss for Unfair Games: Even with the cheater banned and the rollback applied, I am still sitting at a net penalty of -9 RR. Players shouldn't suffer a permanent rating penalty for a match that was inherently broken.
• Hidden MMR Impact: A heavy loss against a wallhacker or aimbot tanks your hidden MMR, which determines your RR gains and losses in subsequent matches. A partial RR refund doesn't seem to account for or restore this MMR drop.
• Matches Should Be Completely Wiped: If Riot confirms that a game contained a cheater and invalidates it, the outcome should be completely rolled back to net zero for the affected team.

Has Riot ever officially clarified the underlying mechanics or math behind these partial RR rollbacks? It feels like the current implementation still unfairly penalizes players for bad matchmaking RNG.