Literally every game has a smurf or someone going AFK - why isn't Riot taking any action?

Honestly, maybe I am just making this post to fume some annoyances. It feels extremly unsatisfying to play a game where literally every game has either a smurf or someone going AFK. Over the past 2 weeks I have played over 50 games, 40 of those were filled with someone going AFK or some sort of smurf. I realise it is pre-season, but Riot just does not seem to care about people going AFK and ruining the game for 4 others. I don't care about bad connection issues or whatever - just punish people. Use a system like Overwatch or CS Go for crying out loud - leaving games or going AFK to often just renders you unable to play for a certain ammount of time.
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