If you’re the best bronze player in the games you’re in, and you’re still losing, what you are experiencing is called “handicapping,” or more commonly known among Overwatch players as the forced 50% winrate. It is explained here : Algorithmic Handicapping (MMR) is Wrong for Overwatch
They seriously need to get rid of this because each game is constantly a coin flip, and the more games you win, the more you get stuck with the worse players out of the 12 players who were matched into the game as you.