how??

how am I actually losing I just had a game where I went 9/3 support and I spoon fed my team kills and we still lost?? wtf??? Are you queueing me up with bronze riot? Like what in the hell is this game. Honestly, I started in season 6 and I still play better than these kids who played since season 1 wtf? How am I actually losing this makes no sense this game man