why is League a toxic place .

Mostly players are mached so that they have all equal number of good ,bad(read bad as low experienced) and very good players, from bronze to platinum...but what happens when 1 player with 500 wins come with a player with 50 wins on the same lane,lets say TOP, and now imagine if 2 lanes are matched that way in favor of lets say red team, and let the thing be even worse, highest elo player in blue team is an supp while one of a red team is on top...can you guess who gets easy feed ? and on top of that all most of the players dont even spy on teammates they are playing with , so they dont have a clue this top is a noob who plays as if he just reached lvl 30 GG BB.... POINT OF MY STORY WAS THAT : Similar cases are pretty much often, which makes games toxic and unenjoyable

If you have similar (real) story please post it (i have seen many people unsatisfied with matchmaking system but i dont see much of the posts about it)

My story is next: Garen(50wins normal) vs vayne (500) ,early feed, ok not a big problem, but when i noticed he doesn't know what he is doing with his champ it was to late, we were playing like 4 v 5 all the time - he ran from her even when she was idk 3 0 and we came to help him(all he needed to do is silvence and ult XD), he was runing away with almsot full HP without even use any of his abilitys ,and whats the worst thing , not even ulty in a single case of teamfights... we didnt flame ,but we all knew he is the black ship of the team...

all of my games are like 50 150 1000 25 700 vs 1500 25 75 500 250 wins normal, now honestly what plays can semi experienced or very experienced player do with one who has 50 or 25 wins, and even worser when that 25 player gets heavily countered by some heavy carry champion ,and he doesnt even know what counters of his champions are XD, let things get even worse, he knows the mechanics of 1/3 of the champions only

So riot, silver 3 player with 500 wins normal cant compare to silver 3 player with 50 wins, i see it all over and over again....There should be higher restriction for players to play raneked ,some quota on normal games won .... FEED IS ONE THING ;BUT WHEN PLAYER DONT KNOW WHAT HE IS SUPOSED TO DO IN OBVIOUS SITUATIONS NOR HE KNOWS WHAT HIS CHAMPION ROLE MEANS OU CANT EXPECT FOR THE GAME TO BE PLAYABLE...AND FROM MY EXPERIENCE EVERY GAMES LIKE THE SAID ONE RESULTS IN CERTAIN LOSE EVERY TIME ,just remember " 4 v 5 " isnt the way how this game is supposed to be........

I accept that i cant win every game, but they could atleast be fair - Fix the matchmaking system RIOT ,please