No, hey now you didn't say anything wrong.
I was calling myself stupid because I make a lot of jokes, and I wanted to make a joke about your comment about jokes being stupid. And to make a Lyte pun. And to be self-referencing with my point, because I made a joke instead of getting confrontational about it. Although, judging by your response, that didn't work well (and kind of proves your point as well!).
I'd chalk it up to tact. Some games you'll want to stay quiet, and some games a joke is all you need. Sometimes a 4v5, as odd as this may sound, can be fun depending on your company. I've had teams make jokes with each other, sometimes I bantered with the enemy and they had fun because while they knew they were more likely to win, it didn't mean I had to suffer anymore for it.
The game is still a game, it doesn't always have to be 100% competition. I mean, in ranked yeah you're fucked, but in normals if you got an afk it's okay to take it easy and have some fun. I've had some hilarious games in AfO or whatever the initials are where it was Bard vs Nidalee, and we made it a game of using our tunnels to sneak to the enemy nexus to get executed because it was clear we weren't going to win.
Sometimes, and I'm going to be frank here, you got to let it go and give absolutely zero fucks. The key, and I am admitting that your point is absolutely correct as well so don't get me wrong, is knowing when.