Deathmatch queuing

I would like to know why I am queuing against plat-radiant players in deathmatch, and it not queuing me with my own MMR? I join a deathmatch really wanting to practice, but it isn't anything like the description "practice", it is more "Get smashed by people 20x your MMR and then you lose". I would like to verse my own MMR, and I am wondering why I am not.
Was this page helpful?