Fix ranking System

I recently got promoted to Silver 1(in silver 1) then I play 3 games won 1 and lost 2. After that second lost i got demoted to sliver 2. Reason for getting demoted it said "You have become inactive in ranked solo que resulting in a demotion to silver 2. Playing a ranked game prevents demotions." I don't see how this is seeing how i just finished playing a game and it says that. ???? Allso i have been Silver 1 three different times this season and getting demoted because of afkers or just losing 1 game. Riot your ranking system is Bs and harsh i have climbed up the ladder several times just to be shot back down because of these reasons. I'm honestly getting tired of playing your game because of so called reasons so fix or you lose a customer and a fan!!!