One time I tried to gank a lvl 6 annie with like 30% as nidalee at lvl5 with full health. I hitthe spear... i had to go in. Well, with that extra level on me, she survived and ulted me. My laner goes "wtf why?" "Why would you go in?" .... like dude OBVIOUSLY i thought i could kill her. Dumb questions like that piss me off. You know damn well why i went in. My response was just "obviously thought i could kill her? Silly question"
So yeah even asking why your ally made a mistake, is destructive. It pisses people off. They know they fucked up. You gonna ask em why they fucked up? Just dont bother pointing out mistakes man. Its only negative. Nothing good for anyone can come from a stupid ass question or observation of a mistake.
And no, I didnt report him. Incase anyone is wondering. I fundamentally disagree with the policing of words.