What I said was honestly half-satire. xD
People in this game naturally like to find the first thing that looks semi-blameworthy and light it up.
Hell, my last League of Coinflip, I was 4/0 adc, went to 4/4 within the next 5 minutes once we started teamfighting because our Zed fed the literal hell out of Ahri, and the whole game, this useless twat is just spam pinging me up a wall and flaming me in chat. (of course, I muted him after the first minute of it, but that doesn't mean he's playing the game - he's still just QQing in all chat while the enemy team runs him over, and saying that him dying from being essentially afk was my bad too. >.>)
Point is: you don't owe these bastards anything. Play what you're playing. It's normals, if you're practicing, and that's what normals are used for - casual play and practicing new things. As long as it's not first/second timing a guy in ranked, nobody can legitimately report you for playing a champion you're not good with...but you can sure as hell report them for flaming you over it.