Getting Banned for Two Weeks for a very small Offense

This has happened to me, and I am not asking for my sentence to be reduced or removed; however I feel that this needs to be addressed. I got suspended for two weeks for a game I played earlier today that my team was loosing. At about 10 min. the enemy team was already at inhibitor turrets and everyone on my team was feeding. My friend and I decided to have some fun with a loosing game by building off-meta things, but we ended up dying a lot because the enemy team was fed. I ended up receiving a two week suspension but my friend got nothing. I feel that this is unjust, because I never intentionally feed, but was trying to make the best out of a game that was lost anyways. I guess Riot Games discourages fun and just because you die a lot in a game means you are feeding intentionally.