If you have patient ，review 2016-2018 community forums
You will see HUGE number of terran whiner complain about carrier for two years.
TVP have no eco advantage(2 base VS 3 base)，also have no TCH advantage(carrier A MOVE)，PVT late game=AUTO WIN
In truth,carrier is hard to counter in ZVP late game，but with old hydralisk,lurker or overlord drop or roach，host combination,P is very very hard to enter PVZ late game，you can check it in match：stats VS serral WCS 2018 .So it’s hard to see zerg complain about carrier
but carrier almost never appear in PVT late game，expect gold level TVP terran whiner’s match.Unfortunately balance team listen to them.
If you have patience to review 2018-2019 forms ，you will see all P units T whiner complain about got nerfed：carrier，stalker，Colossus，Immortal，zalot,ob,tempest,templar,forge TCH.
And all T units they complain about got buffed:Battlecruiser,Viking，Raven，ghost EMP,stim，Thor.And they want more
these are old forms:
Too many ,you can check TVP is broken 2018 2019 in google