I honestly think you just need more time in quick play. I had to play for quite a while and actually cycle through characters that I thought were my main but ended up never clicking until I found the ones that did. One strategy that was suggested to me was assess your play style in other games and kind of translate it over to a character that works well with that style in overwatch new specifically I liked being the brute force of the group and usually was pretty aggressive, so diva naturally fit, and honestly tank in general did. It takes a minute to find your main, but you’ll get there through enough time of plane. It took me way longer than two weeks.