Coin flip game?

I ve been playing League for like 3 years now and i legit havent felt like this in any other game.My last games feel like a complete coin flip.Its not even about skill anymore ,games are decided by which team got a troller/inter/bad player in their team, its ridiculous.I wont talk about flex or normal i will stay to the mode that makes me wanna play this game and that is ranked. In my last 2 games i had an enemy sit afk and an enemy bad player that inted/had a bad game.Both of these games were a 50-50 untill someone messed up (thank god that they were on the enemy team). Which brings me to reason why i made this posts, why are games such a coin flip?None of those games were won by pure skill or outplay or a baron/drag steal or any of that fancy stuff both of them were won cause the enemy team got worse players than mine.How is that fun? from s2 to g2 that i am now i have encountered 1-2 GOOD/AVERAGE jungle players that actually made me push myself to win while all of the others are just bad. The only reason why i play ranked is so can test my limits and skill but i dont get that here.Its like am playing vs autofilled junglers every game which turns me off the game since theres no real competition.if every game is a snowball and we find the winner 10 mins in its a huge turn off for me.My attitude has changed too,from "Time to play ranked against difficult junglers to improve" to "Okkkkkkk who got a troller this time" I believe that Riot should really look into their matchmaking system cause its current state its a joke for a game this big.