Afking Intermediate Bots

So, legit, I was playing a custom game where I had intermediate bots on my team and enemy team. I was the only human player. I did this cause my lag is too inconsistent to allow for a safe, real game with human players so I decided to practice csing instead.

Anyway, half way into the game, two of my teammates went AFK! for the rest of the game! I didn't even flame! What is this design? Is afking mid game a part of the game design? Is this what you are teaching your new players Riot?!?!

It wasn't really a problem tbh since I wasn't struggling that badly with bots (ecks Dee) but it just took me by surprise.