My question is.. Why..?

I'm so extremely tired of players coming into Ranked and deciding they're going to try a champ they bought 5 minutes ago and barely played. Yes, I'm silver 5 and I'm not the best player in the world, and I'm trying so hard to climb but it's hard to when people like this show up on my team. I literally go into ranked playing ONLY champions I've played to the extent I know them from top to bottom. Why do people think this is a good idea to come in and wing it? I just got out of a game with someone that went 5/16 that ended up ratting out the fact they had played Zed ONCE. Sadly this isn't the first time which is the reason I'm making this. I've discovered as you get closer to lower ranks, the more likely you're going to get people who decide to try their new champion on ranked..

Please for the love of god, don't put others at risk of getting a free loss because you want to try a champion at Ranked. It's not worth it. Play a ton of normals games with the new champion you've bought and then once you have I bet you'll do a lot better or realize it isn't the champ for you.

PS ThIs isn't me (again) saying I'm the best and I don't deserve bad teams, I'm sure I mess up sometimes too. But this in particular has no excuse.