I’ve noticed that if any other hero gets a massive pick rate, they get absolutely battered with the nerf hammer. Every time these 3 do, they get a little tickle that does almost nothing, and only end up falling out of the meta when Blizzard release a broken hero that makes them harder to play.
Why?
They’re just heroes, why are these 3 specifically given favourite status? I don’t get it.
Rein is significantly better than all of the other main tanks. Ana has her ridiculous ability to take away all healing… " but she has to aim so she’s fine". Zarya is only so good because D.Va was nerfed to death and Hog has no protective abilities. Her synergy with Rein is also the best in comparison to the other off tanks.
Other characters suck but they suck less.
Rein is only ever good when supported. Ana requires insane skill. Zarya, I got nothing. She W+M1s with so much ease, it’s not even funny.
Because Zarya and Reinhardt weren’t hit with heavy nerfs compared to D.Va.
Truthfully? Rein, Ana, and Zarya mains only ever want those characters to be meta because that’s all Overwatch has ever and should ever be to them. All the chokes in the game are made around Reinhardt’s barrier size, and his ability to block damage is unmatched. Zarya and Ana allow Reinhardt to get away with stupid crap other tanks wish they had the freedom to do. Brawl comps 24/7 is what they like. Any other strat is automatically cheese. They believe that Rein/Zarya/Ana comps are the most skill-based and true Overwatch comp that should be the balance of how the game works at a fundamental level.
Actually, it’s high time Winston dethroned Reinhardt, or maybe Wrecking Ball. But then bad players who can’t use cover properly wouldn’t be able to climb.
I think the real question here is why do any of these characters need nerfs right now? They really don’t need changes at all. Zarya is a terrible tank a lot of times without Reinhardt.
because they are part of the holy trinity of, hard to play, but super easy and simple to fight characters and all beloved to the point of cult like defence.
everyones perfect meta is literally, rein,zarya/dva, luci/zen, ana, tracer/gengi, mcree/widow
Define “insane”
Not a fan of the volume of hyperbole used on these forums. People make positives and negatives in complete polar opposites far too often around here
For Reinhardt it’s; Orisa and Sigma are pretty much trash on ladder unless you HAVE to play them because Reinhardt is banned. Winston needs too much teamwork and co-ordination for most players because of the insane Burst Damage Creep
For Zarya; It’s literally ONLY ladder. D.va is still just flat better in more general situations
For Ana; It’s pretty much her or Moira depending on bans. Mercy gets by because of Echo. Baptiste was overnerfed to be useable outside of OWL; Moira sees as much or more play than Ana when she isn’t banned; Mercy is pretty much a pocket Echo bot.
So lets say you nerf them; people will naturally gravitate to the next best option of the worst. So that would be just Orisa and Moira for the tanks because they’re still somewhat playable past Plat, with either Sigma, Roadhog, or D.va for the Zarya replacement
for zarya, the problem is her simplistic design.
example: i love making custom games where i give all the heroes some whacky changes, like making reinhardt into a doomfist 2.0 or making ana a sniper assassin. etc
what do you do with zarya? idk, i just always disable her because even after hours i cant find anything i could tune with her. she has bubbles. ok cool. a beam and grenades. ok. thats it. and her ult thats absolutely game changing, but any kind of nerf would make it pretty useless.
shes just too simple to really change anything about her.
I mean she is the hardest hero to play.
Because it isnt a good idea to make every character trash tier.
ROLFMAO 
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Balancing seems to be based on OWL and opinions of the pro.
It is a possibility that they simply don’t want these heroes nerfed.
If you could alter the actual weapons abilities directly. I change her ult and beam system. Bubbles I would like to test more defensive and cleansing abilities. Workshop doesn’t let you do that.
A simple ult change. Activate Graviton Surge just like halt. Another basic change. When bubble is destroyed, it causes enemy knock back.
People on the forums have worse memories than people with dementia
We literally just went through this with Baptiste; who went from an under-preforming support, to being meta in ONLY Masters upwards, to being beyond broken and in need of so many nerfs to every part of his kit, to being one of, if not, the worst heroes in the game
They aren’t. Any nerfs they get are either ignored or called “a slap on the wrist” even if they are large nerfs.
LOL.
Okay bud, whatever you like to think.
No she is not, the only time she is ever terrible is when 2 off tanks are ran, which is when the tank comp sucks overall.