I am not a Dev, but I have some evidence that may help you understand; I’m hoping you’ll be civil and accept this as an argument. It’s a lot, but bear with me.
There’s a few Heroes who don’t Hard Counter anyone, and are just simply fun to play with the added bonus of several unique utilities and advantages when played skillfully.
For Example, over half the roster counters Hammond by reducing or negating his momentum with stuns, slows, traps, knockbacks, knock-ups, momentum inducing melee (Reinhardt hammer); nothing in Hammond’s kit completely turns off or deletes an enemy hero, and more than 60% of the time he’s at a disadvantage, but he’s still incredibly strong, unique, and fun to play despite that adversity. Symmetra is in a similar situation except she’s not hard countered by as many, but she holds invaluable team utility that’s even recognized by OWL once in a blue moon. I’ve always worshiped a good, creative Symmetra on my team!
Symmetra is one of those high skill, high reward trappers & tricksters who “counters” anyone who falls into her web of turrets and ignores her presence. I say “counter” because it’s not really a hard counter and you are correct in thinking she doesn’t have any because she doesn’t. She holds the unique utility of being able to re-position her team in moments of danger or for flanking and creative uses; with the added bonus of having a game changing Ult, and being an incredibly powerful assassin if you manage to be mischievous.
You have turrets to deter flankers and remove mobility, AOE right clicks for stacked enemies, incredibly strong stacking beam damage to reward aim skill, and an Ultimate that can completely shelter your team from one front of damage and allow them to weave in and out of it for an advantage in team fights. Ignoring a skilled Symmetra during a team fight leads to instant regret a majority of the time . Her Ultimate is one of the most powerful defensive tide turning abilities in the game when capitalized on. If you’ve ever caught a swinging Hammond, or a wall riding Lucio in your turret you understand the utter despair she brings to mobile heroes lol. Subterfuge, misdirection, and illusion are your unique weapons on Symmetra.
The devs & players do sometimes describe this game as “based on rock/paper/scissors” style gameplay. However, the Devs never say “This game is rock paper scissors”. They explicitly avoid “rock/paper/scissors” gameplay for hero design in this interview from Gamespot back in 2016 titled “The Story of Overwatch” (it won’t let me post a link for some reason lol). Jeff States in that interview:
“We do not design our characters to be this perfectly balanced, 1v1, rock-paper-scissors, “every hero can beat every other hero in a 1v1 situation”–they’re absolutely not balanced and tuned that way.”
He is referring to them designing Team Deathmatch, but the statement holds ground on it’s own; they are absolutely not balanced that way.
If you’re still holding true to that rock/paper/scissors mantra, I’m afraid you’ve dug yourself into a hole, that’s not what the heroes are about-- the devs themselves have said that on several occasions. Yes, some heroes do have an easier time defeating others, but not all of them do, nor do they have to. A skilled player can defeat all their counters; improvement, and cohesion against the odds is what this game is about. Moral of the story is, don’t give up hope on Symmetra, she’s incredible and you should play her if you have fun being creative with her kit! Bommer#11853, if you want a teammate who won’t berate you for playing Sym! .