To get better and hopefully at some point reach grandmasters.
Been playing Overwatch since the beta, switched from PS4 to PC a year and a half ago. Climbed to top 500 on support on PS4, now high diamond-mid masters support main on PC. Can play all supports to a somewhat high degree, although better at certain ones like Ana, Bap, and Brig. My Lucio, Zen, Mercy and Moira are playable but not as good as the others.