''I expect you to predict my pick and trash you if you didn't'' Ranked Teammate

Enemy team builds a VERY squishy team (TF, 3 ADC and Panth). so I pick Karma support to burst that down since my other teammate already pre-selected Cait, lux, and Rek'sai. then you have last pick who doesn't say a word. He picks Olaf, then the moment we start to lose,I get Trashed on for not picking something with CC even if I'm doing well (ended game 6/7/18, full build, over damaging our mid easily...).

How can you expect to pick a support that fits our team, when you don't say a word, you're last pick, I picked karma quite a while ago and Top lane can pick champs with CC just as well.

The irony he ended 9/14 getting caught all the time and building no HP on Olaf. it's still the support fault tho ;)

What's your story ? XD

TL;DR Please give an IDEA of what kind of pick you go and don't trash your team for something that didn't fit with you perfectly if you gave them no clue -.-