what is this ranked system riot

dear riot,

i hope you are enjoying the start of the new season just like we all are. woke up in the morning all pumped up true story played a ranked game by mistake and won out of pure luck. so i as any bronze player would think at that moment the horrible elo curse has been lifted (which we all know dosent exist). anyways rito i kept playing my series was 2 wins 3 losses i never lost hope i pulled out the big guns (aka naut) go tank and win my series ended with a noobish 7 wins 3 losses i pinged i sucked up to my teammates i was just one step away from going to their houses and doing their chores. out of ten games i won 7 and you might know where this convo is going to when the screen finally came up to tell me where i was placed bronze dang 5 why rito whyyyyyyyyyyyyyyy i cri every time