I don't understand this logic

Players A B and C want to win.

Player B secures a kill A B and C were fighting.

Player A flames player B for 'ksing'. (By the way, ksing is not a real thing)

Player C dies to a gank.

Player A rages because he wants to win and his team 'sucks' so he sits in fountain and tells enemy team to push mid and we won't defend.

So... you want to win but you are willing to guarantee a loss by sitting in base and being a bitch because your team is not playing exactly like you want them to? How does that make any sense? You ganked bot and the support ended up getting the kill. Who gives a shit... your team got a kill. Top lane got ganked and died. Doesn't matter that he was still ahead after the death because he was wildly ahead in cs and had a tower by 8 minutes. Go ahead and rage quit because you want to win but there is clearly no way your team that is ahead can manage it because you didn't get that kill bot and top has one death.

Thank you for the free win that helped me get to plat but your team would have easily won had you not been a little prick. I don't get it. You wanted to win but because your team wasn't winning the way you wanted them to you forced them to lose. Brilliant logic asshole.