Fun game in losing games!
Heres a fun game in most elos called "poke the jungler". Basically see how little you can say while making the jungler explode. You see junglers are the most prideful people in this game by far. They are way more so than marksman.
So if the enemy jungler is camping you simply say "seems the enemy jungler is a bit better at ganking." If youre on toplane this will ALWAYS trigger a reaction.
If they miss smite on baron or dragon you dont have to flame them for it. That might risk ban. All you have to say is "Generally freind, you should try to smite around the end of the baron when you see some of our damage is likely to get it low to make youre smite more likely to secure baron." If this seems obvious to junglers reading this its because it is! But as most junglers think they would be in LCS if it wasnt for their teamates.
Remember. Whatever you do dont flame them. You dont need to flame a snowflake to melt it when making an observation or trying to give a tip will let the sun do the work.