Why people whine about getting fed and who's overpowered why do we always lose..

Okay.. So I don't know how to imbed a photo on here but the other day I asked the forum why I keep losing my games and whining about bad team, teamwork ect.. And a fellow leaguer told me that it all depends on what you do yourself and focus on carrying the game and winning not worrying about the your teammates and getting mad at them.. Sure you all get mad at teemo zed Yasuo or Kat because they can be annoying.. Haha but the more games I play I see my team fighting and arguing this and that " you fed " " your dumb " but is that going to help.. Complaining about things.. You need to Carry for your team and relay on the others.. Lately i have been on a terrible lose streak until he told me this..(go give him a thumbs up) RedniwediS.. But the past day I have one 4/5 games by trying to carry and this last game I played with adc I whent 23/5/11 28 k gold and 359 cs.. My team wasn't that good but I carried for them and we won so ik this was long but focus on yourself and you might have a better chance..

Edit: stop whining about op champs it's just because their fed and just carry for yourself don't worry about others.. (I hope this is in the right place :/) thanks for reading if you like it vote up if it's nonesence don't down vote please I want whiners to see this