when im in a win streak, it's because i dodge people with a bad match history or got lucky with the match making but we all know that luck doesn't last and hits you rock bottom (it's not accurate considering people do have bad matches but it helps dodging bullets) you need more effort and patience if you want to win, know your team and know yourself to increase the chances of victory.
nearly every game is like that, it's either your team or your enemy team feeding like this and usually ignore the chat or mute everyone that flames them, i'm not sure if inting or feeding match after match gets people banned but i've had quite a few get banned for verbal harassment after feeding heavily.
so many players don't belong in the match making and it's entirely riots fault for reducing the experience required to reach lv.30 forcing new players to fight high levels without any experience, this is the main cause of absurdly high amount of feeders because they had no time to learn or prepare to fight experienced players.
not to mention smurfs keep creating accounts over and over smashing new players for better kda and win rate / ranked placement so the new players get ran over in that process so they have even lesser time to prepare, when you get demolished you can't learn anything from this and just become a useless feeder that gives cringy excuses like "im not trying" "it's just norms" "lag" then FF at 15 every match unless miraculously your team carries you or your opponents turns out to be worse.
the game has been tedious for quite a while to a point i'm surprised people held on to false hope of them addressing these issues... riot doesn't seem to care and it's sad because this was actually one of my only games i enjoyed