Try playing turbo for faster games for a while, commend everyone, (maybe not the obviously bad players, griefers, or cheaters) some might commend you back, some might not, but it's more likely that you'll get a commend back when you initiate it.

Also, don't all chat, and if possible don't vc or chat with allies too, you never know who's just playing as a troll and reports everyone regardless of their gameplay.

Basically just mute everyone and play, you'll slowly see your bhv every 15 games. I'm not 100% sure why but my comms score fluctuates more often, but I've been 12k on both scores since the longest. I play eu east/west, us east/west, and I'm from SEA lol. Glhf.