I'm gonna complain if Darius gave his top lane 3 kills before 10 minute mark and ended up 1/8 with a very easy to play champion and wouldn't even try and communicate with pings or chat with me and would just ignore me and continue to feed.

Yay im gonna point out some obvious things in this thread

Case 1:
Lee Sin [00:18:51] omg ****ing darius
Lee Sin [00:18:55] why do you engage when I'm not there
Lee Sin [00:18:57] you moron

Yes very encouraging words

Case 2:
Lee Sin [00:13:38] ****ing jax
Lee Sin [00:13:41] you're an idiot
Lee Sin [00:13:45] why did you feed garen
Lee Sin [00:13:51] you ****ing engage on him when you gave him 7 kills
Lee Sin [All] [00:13:56] idiot jax
Lee Sin [00:14:06] can I get 1 team who doesn't feed
Lee Sin [00:15:02] stop pushing ryze
Lee Sin [00:15:22] jax get cs
Lee Sin [00:15:24] for the love..
Lee Sin [00:15:53] jax stop feeding him
Lee Sin [All] [00:16:13] **** this jax fed you..
Lee Sin [All] [00:16:17] ****ing idiot
Lee Sin [00:16:29] everyone game I join a feeder

This is nice too, and then you announce it to the enemy team.

Seriously, you guys who keep posting on threads and complain why why why. Just because you don't think its offensive doesn't mean everyone else wont. Take it up with Riot if you have a problem, not hear what people have to say where you end up embarrassing yourself.

Neko already pointed out most of what you said that was punishable in this case. Note that nobody's saying you shouldn't get angry: I get angry at my teammates all the time. The difference is that I never type out my anger to the rest of my teammates (or, like in your case, to everyone in the game sometimes). You can try to be constructive all you want, like telling jax to tower hug until a gank gets there or telling darius to hang back when he's by himself. When you start insulting people is when you start breaking the summoner's code.

If you can't say it nicely, it's best not to say it at all.