So Tired of Leavers (Riot, care to chime in?)

So, we all know that people leave the game at times. Whether it be to go do something in real-life, because they're raging, because they're losing, whatever it is, sometimes people just leave. And now you're left in a 4v5 scenario. It sucks, it happens, oh well.

However, what I specifically want to address is when someone leaves during the loading screen. I just played a game where our top Irelia started loading into the game and then...didn't. The game was a 4v5 from the start (with a Garen as the enemy top lane). Well, you can guess what happened. They shoved lanes, we couldn't contest objectives, GG from the start.

Now, please explain to me why we can't have a surrender option after 5 minutes if someone never connects to the game. This wasn't even Ranked, this was Normals. How can I learn to farm and play as ADC Ashe when top lane Garen gets all his farm, shoves to inhib turret and then just starts diving bot lane under tower taking no damage? Where is the enjoyment of this? And then my support Thresh went AFK 5 minutes in because Irelia wasn't here. So now I'm in a 1v2 lane in a 3v5 game with no option to surrender for 15 minutes.

Can there please be a way to prevent this? Allow surrender in Normals if someone on your team never connects to the game?

(And before I start hearing the choir of "It's possible to win 4v5," it is very rare to win a 4v5, especially from the start of the game. I don't mind if someone rage quits 20 minutes into a game because there's still a chance of winning, but having a game become a 4v5 from the start and then a 3v5 five minutes in....yeah, I'm so glad I get to either A) sit at fountain and wait 15 minutes [and probably get reported] or B) continually walk into the enemy and die under towers. Sigh.)