PvZ is unplayable lurkers auto win against literally everything on ground, if you go sky toss corruptors + parasitic bomb beat everything and you run into the same problem as a terran player which is that vipers are unbeatable since they can just pull things into their army and auto win. Carriers are literally useless due to the dumb shroud change, it’s unbeatable by skytoss. Zerg can just overwhelm you.
TvZ is beyond unplayable and shown by maru losing 0-20 to serral and that’s actually including sub-optimal strategies by serral.
TvP is unplayable, there’s no counter to skytoss, 200/200 thors even lose to mass carriers. And if you attack you lose and you can’t attack up front it’s extremely likely the dance will go the tosses way. Not to mention tons of other examples of imbalance.
Terran still has much better chances against zerg than toss which is guaranteed to get moonied at the highest level by zerg. On the ladder terran is better against zerg. PvZ is so shamelessly insane it’s not even funny. But zerg is still advataged against terran and just needs to build queens.
The biggest example of imbalance in all of gaming, still, is TvP, even not counting skytoss it still probably qualifies. With skytoss a gold player just needs some things to fall just right to absolutely destroy maru.