Like does our rank reset every episode, what is mmr and rr, how do placements work how does the leader board work, etc

Just queued into a game, had a person say they were gonna throw before anyone even chose agents, started spamming the N word and saying it out loud, but we couldn't report as you can't report until the game starts (and we obviously dodged)....

For some reason, it's so satisfying to do headshots using a guardian or sheriff. The euphoria I feel is amazing. It's not the same feeling as killing them with other weapons like the vandal and phantom. I was encouraged to use them because...