Classification of the bad player in ranked, I have seen in gold and lower
- The laner that just feeds a level 1/2 first blood and proeeds to repeat the process every 2 minutes
- The afk farm jungler particularly the Nunu's
- The rambo tanky top particulary darius/olaf's that will keep split pushing top lane deep and get killed 1v3, proceed to repeat again/again
- The team that keeps trying to init fights in enemy jungle (usually without their carries) even though their lanes are pushed and behind
- The support that runs through a giant minion wave to harass and proceeds to get 1v2ed
- The mid lane Varus, top lane Vayne
- The AFK farming ADC that is always on the other side of the map
- The team that is farming jungle instead of taking objectives, particularly when I am pressuring the top or bot lane
- The jungler that doesn't look at health bars or see the giant minion wave in front of their allied laners and proceeds to get 1v2ed
I will add more as I remember them, but these are the usual types of bad players I see almost every game.

before they went LCS
Kappa