LoL and its useless system

just played with game with a top lane yasuo who went 0/11/0 56 cs in 18 minutes and a Rengar jungle who went 0/11/0 and 10 cs and they both added after game so show me they would not get banned because riot doesn't care. just lost 5 ranked games in a row from promos down to 3 LP with at least a afker after 5 minutes or 1 to 2 people on my team having 10+ deaths. They say climb your way out of elo hell, well I want to know when did climbing mean carrying 4 other people to Gold+ in order to climb? I've done 64k champ dmg as mid lane Ziggs and lost the game because Riot does nothing to people for throwing and just wondering around the map do nothing but dying. Riot says they are more worried about the toxic players, well you know what, PERMA BAN the feeders and troll and there will be a TON less toxic people. most people are only toxic because of bad plays and really bad plays. Having your jungler die to jungle mobs 5 times in 1 game should be a ban right there.