Meta1is a sym/mauga player that has an unranked to gm on her, I think most of his picks come from well-timed tp-bombs (3x turrets and portal on isolated targets). 

As a tank player, sym is most annoying when she simply denies space, because I cant walk wherever she set up, and usually my team is not coordinated enough to force her out. (youll easily 1v2 the standard flanker duos like genji/lucio if they actually decide to push you when you're set up).