I just figured out that the matchmaking of this game is a mess, when the matchmaking queue doesn't find enough players queuing around my rating, what it does is match me with random Low Rating People.
There are times of the day where the queue takes a long time to match and ends up matching you with people much lower than your rating, which sucks.
I'm Platinum T2. Yesterday I just lost two bad matches (20-500/0-500) and asked my team what rating they are, In these two bad games that I had they answered me Gold T1 &T2 while the other team were all platinum, r*ping us!!!. So I think my theory is true.
I really prefer to wait 20 minutes of queueing to be placed with people around my rating and not this sh****t.