I'm going to truncate my responses a little - Don't think I'm trying to be short, I just want to key in on specific points - Writing a lot of these a day takes up a bit too much time so I'm just trying to be a little more concise.
#1 - You do poorly, your team harasses you, you declare it's "gg" at 4 minutes, and yell in all caps. Then you and your team get in an all chat battle. Don't do any of the last 3, and this would be a pardon.
#2 - You and your team jabber a lot back and forth. You're angry you're not getting ganks. Your team is angry you're doing poorly. You decide to chat back and forth in all chat again and call out to report your teammates for trolling while going 0/3/1. - If you want to report someone, do it yourself, no need to get others in on it - No reason.
#3 - You say nothing the entire game and do poorly. Not sure on this one.
#4 - Nothing much this game except you say "gg graves" and harass graves a bit. He's obviously doing bad. Bot did bad. No need to say it though. Honestly, not much on this.
#5 - Dunno about this one.
I have to say, this is a puzzling case. Only 1 and 2 had anything remotely bad in them. My guess is the punish was based on those. Aside from the stuff I mentioned, this wasn't a bad case.