It's okay to try so hard and then lose but...
But why all the negativity after few bad events happens in a match if you REALLY want to win deep down ? Not all games go on your favor sometimes you get rough games and a little bit hard to win , doesn't mean you have to let it go lose hope and give the ennemy team an easy win. Do these people not have any a little bit of competetive game spirit ? I understand you can't have 100% win rate but atleast try your best every game.
Adc going afk in fountain because she died two times constantly to shaco ganks this is an example of a player with a weak mentality , or jungle diving a cho gath at lvl 4 then after he died he start saying things like '' gg lost game ff15 '' instead of something like '' oh lol my bad sorry gotta do better next time '' another example of this is '' open any lane '' or '' gg i go int/troll ''
and if you tell me they do this because they get flammed by teamates , always instant mute them replying to them would make you look more stupid than them. There are many games we were basically getting roflstomped by ennemy team ( ennemy 15 kills ahead or so ) Just because our team didn't stop trying their best they didn't give up and in the end we did a great comeback and won.
EDIT ; i am sick of being like the only one with almost nice competetive spirit and sportsmanlike behaviours in my games , i used to be the '' gg retard team i am afk '' kind of player but i have realised that doesn't help at all and so i reformed myself and it seems that i started changing slowly after i got banned for 15d in s5 and now i am completely diffirent.