AFK in Game Penalties

My thoughts are as follows: In ranked, the punishments for leaving, afking, and disconnecting from game should be much more harsh.

I get that sometimes connection issues are legitimate and I'm not advocating immediate punishments for first time offenders or anything like that. That being said, today has been an exceptionally bad day of ranked league for me. Nearly every game, someone rage quits. Last game, 2 people on my team rage quit. Now I'm not a toxic player, and overall these teams were pretty balanced and fun until someone decided they shouldn't have died... and then they shouldn't have died again... and now it's the junglers fault... and the next time no MIA was called... and then another excuse until the inevitable rage quit. Then we lose because 4v5's rarely go well. Now admittedly, I'm bronze 1, working my way out again (or trying). I don't play a lot of league and I'm definitely not great by any means but these people who rage quit literally do not care about their rank or their team. They throw both to the curb any game that they're not fed. The punishment for this? 5 minute? 30 minutes? Hardly a punishment.

What is the correct solution? I do not know. All I can say is that it's frustrating for players like me who just want to play the game, win or lose, to be put in a situation where the game is no longer fun.