How would this be settled in the new Report system?

I was recently playing a game as {{champion:236}} and lost lane my support then blamed me for feeding them then decided too leave my lane and leave me to face off against the fed vayne, at the 30 min mark I was being abused by my entire team for feeding on purpose they all then claimed they would report me for "Feeding" even though during that game I was Abused by my team mates. I then submitted a report against my sup for being toxic. So in short what will happen ?
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