Low reputation score? Can't play with those ******* n00bs but you also can't AFK in trio/leave or you might get banned? Worry not my *checking notes* friend. This simple guide will show you how to get some rep. points very easily and effortlessly. :3

Now, it is very important to do these steps in this exact order or you might get muuuch different results. Repeat after me:

1. Queue to bloodbath.

2. AFK.

3. Repeat.

I know they are quite hard, but believe me - i haven't found a simpler method yet.
On the serious note you don't need to do anything. Just queue and queue again after match. There is no such thing as AFK buster yet and people generally don't report afking players in bloodbath since most of them go there to do daily quests anyway.
Enjoy your reputation points so you can quit again while playing trios...♥♥♥♥.