I know the basics of mmr, but i have a question. Lets say my rank is gold and my mmr is abt diamond. Do i get queued w diamonds or ppl with the same mmr as me?

I am still new to the game, I main Killjoy. And to put it briefly, I should be allowed to pick up my Swarm Grenades and reuse them in the same round (not keeping them for the next round). I tend to struggle when I do not have them when...