It depends on what you mean by competetive.
As an Abyssian main, Hai secondary (yes, I said that) I can say that Abyss is not much worse. Aggro Swarm, Crown Swarm, Wanderer, Aggro Cass, Lord Cass/Maehv, DW Maehv and Abomination Maehv are perfectly playable at least up to diamond. Arcanyst Lil is a bit forgotten, but is still powerful. Not that any of those decks are top ones, but isn’t it the same for most Hai decks you mentioned?