You’re simplifying GOATs to just 3 supports though, which isn’t the case. GOATs has 3 tanks and 3 supports. Those 3 tanks should be heavily countered by heroes such as Sym, Sombra and Reaper. The heroes who should counter GOATs though are far too weak to actually do that though.
There were 4tank comps before brigitte with lucio powering them. e.g lunar colony 1st. But nowhere as meta dominant (and you had dva on steroids). Brig is a catalyst, if you remove her from the equation for other support or tank it weakens the comp a bit.
they nerfed ana (which made her fairly vulnerable to genji tracer) and they nerfed hog (which made winston and dva uncounterable) while also buffing monkey and dva.
Did GOATs exist before Brig was in the game? Answer is no, so why would we nerf another hero that’s crucial to running a simple deathball, even 2-2-2? If anything, the smart thing to do would be to nerf healing across the board.
Number of bullets per shot has been increased from 8 to 11
Secondly, they were most definitely nerfs to triple tank. Especially considering the D.va nerfs.
Brig is sitting at a pickrate of 4.06% this month and 3.30% this week in GM, making her the 4th most picked healer there. Why would the sole enabler of GOATs be sat below 3 other healers (considering GOATs has 3 healers) in pickrate? And, why would Lucio (who you claim to be just a part of GOATs) be sat at a pickrate of around 12%?
Did GOATs exist before Brig? That’s literally all you need to think about. GOATs doesn’t work without Lucio, but any deathball doesn’t without him. But sure, nerf him so we can get back to Dive.
I don’t know why this simple thing is so hard for you to comprehend. All the other heroes who are a part of GOATs existed before, yet there was no GOATS. Suddenly Brig comes a long and it does, so for the comp to be as effective as it is and to dominate the META, clearly Brig is hero that’s responsible.
Or maybe Brig is just as important to GOATs as any other GOATs hero? I mean, you said it yourself for Lucio:
So lets say Brig was always in the game, but Lucio was just added. GOATs would become meta, obviously. Is Lucio the sole enabler of GOATs because before his addition, there was no GOATs?
It kind of already did though. In fact it was worse. It was Ana and Lucio and 4 tanks, usually Rein Zarya D.Va and one of the other 2. Lucio always enabled tank play like that, and Ana was so overpowered at release she created 2 metas just by herself.
She got nerfed and Mercy got buffed and so dps were viable again.
The problem is the tanks in this game. They do almost as much damage as a DPS and their high health lets them stay in battle longer making up for any dps deficiency. Combine that with the ability to sustain them and increase their mobility and you have a deathball composition which already existed before the team GOATS made theirs 3-3.
GOATS was already a thing, its just that one team brought it into notoriety.