Report the Feeder? Or report the Rager?

I just had a game as top lane Mordekaiser. And after about 7 minutes, I was doing well, mercilessly wrecking enemy Sion everytime he tries to gain some cs. He even kinda raged a bit in all-chat by blaming his own jungler for not ganking top lane. Feels good right? xD

But then, the problem started. As I finished cleaning up top turret, I noticed bot isn't doing so well against a Jinx/Blitz bot. And also noticed our jungler & bot lane having a long feud of "our jungler didnt gank, report""you juzt got rekt by jinx, y u suck so hard". It was toxic as hell, I can't even stand it. After that, our ADC tried her best in cs-ing all she can to gain some more strong AD builds, and also witnessing our jungler Lee Sin, who all he does is typing every hate word on our ADC for losing a "simple bot lane".

When it hit the 20 minute mark, the enemy has already broken into the base and destroyed our inhib (I got 4/8 in the end, mid was also doing horribly). By that time, I noticed only 4 of us were at base, and saw our jungler just typing ragy shiet and went up to the enemy face, as if he tries to make some "LCS plays" or something. This continues on til our nexus got destroyed.

So in the end, at the champ lobby, I told everyone to just report Lee Sin for being toxic, not bot lane. Sure everyone has their bad days, not always a 100% anyone can win lane. This was just a bad game, until all our jungler does is talk talk talk, as if it benefits the whole team to win the game. And so, yes, I choose to report the Rager. I can't stand people who easily blows their top off on such matters without even trying.