Rating below 1000.very high chance you are fighting with bots. They have pretty mature database if which combination has higher win rate. Some of the bits even look at your data to customize the pick for you . So generally , a lot people in fact are pretty suffering when they are at Bronze league.
A similar things will also be seen in silver and gold. But it's a bit better due to more choice on cards and their wider abilities.
So good luck.
oh that is why thanks for clarification .. now i got it..
what is the solution of this problem ?