Riot needs to do something about this community!

So I queue up for ranked, I get adc, I go twitch, with a nami supp, all is going good, we go to lane, nami decides she is going to roam level 1, I say nothing, I stay in lane till I eventually get dove level 3, and nami is still level 1, she then starts flaming me for dying, in a passive aggressive manner because she wants me to flame back, she comes back to lane, refuses to heal me with w, I die once because of that ofcourse, then she leaves lane again and never comes back, I lose turret and do nothing until we lose, and I need explanation, how is it any fun when you run into these kind of players who don't even get punished for it, and if I flame I do get punished, it is absurd how similar behavior goes by as if it is nothing, even though he ruined the game for 4 players, this is just an example of many many more, players like these need to be punished because they do this with the intention of ruining the game.