So yeah after playing for a month now, sticking to one or two heroes is a good way to lose a lot of games. There's this one girl that likes to play Mercy every game no matter what. Soon as her name pops up in game, i roll winston and bury her everytime she shows up. she never changes for any reason and just gets killed within 5 seconds of showing up to the fight everytime i play against her.
its not hard to remember who likes to stick with one hero and beat them every match.