If anything, Kyuremu might get Snow Warning if he gets an alt. forme in the next game (even in B/W he summons a snowstorm when you go catch him!).
I'm stunned to see how people underestimate him, because he's easily the best bait pokemon in the game. Once he's sent out you either have a Magnezone/Shanderaa counter (everyone uses Steel types so this is a given) or you lose.
You can say the same about every single dragon (besides altaria). If he were the only dragon in the metagame probably he will be a force but in a metagame already centralized around steel and dragon ( most of them outclass him) he isnt aporting nothing new, he is just a subpar choice for your team. Also one of the salamence most common partner was magezone, so pairing a steel traper with a dragon isnt something new or surprising
You're pretty much forced to switch to a Steel type if you don't want to eat his STAB attacks AND you can't rely on Scarfed pokemon because of Frozen World. Perhaps this is the one and only offensive pokemon without priority moves who really doesn't care about subpar speed.
Again you can say the same about every dragon type, but the diference is that not even steel types cant swich into them without fear of their other moves, while they only have to be careful of hidden power fire from kyurem
Scizor is not a counter unless it's raining because HP Fire OHKOs.
Unless you spam a unSTABed 70 BP move everytime scisor is a hard counter
Sazandora doesn't even come close because Dark is a terrible offensive type in this generation given the sheer amount of Justice Heart pokemon running wild
I can see here you actually never played the game and you are just theorymoning out of your ass. Sazandora movepool is great with great coverage, she dont need to use STAB dark pulse just when she needs to. And dark/dragon + levitate give her a good amount of resistance a low weakness
Latias can't hit hard on the physical side.
Latias is a level above kyurem. Recover, wish, CM, surf, grass knot, thunderbolt/ thunder, trick, not weak to SR+levitated, etc. The only way kyurem is not outclassed by latias is using outrage, something he cant with set you supported before (draco meteor, frozen world, HP fire and fail blast).
Dragonite has serious problems with water types[
He can break stall, set up DD, roost and an amazing movepool including a priority move (extreme speed). And all of that while keeping a good defensive types. Im pretty sure thats better than beating some water types
Garchomp and Salamence might be better on the offensive side, but neutrality to ice instead of 4x weakness is an advantage that shouldn't be overlooked.
This is the worse part of your post by a long shot. You are saying that x4 ice weakness + good amount of resistance an inmuties (combined with a good moveppol) is worse than ice neutrality + a retarded amount of common weakness and no inmunities (combined with a bad movepool). Maybe you like kyurem because idk he is "cute" and all that BS, but stop overrating him. In your post you are not even considerating any other pokemon, when you want to know a pokemon effectiveness you have to look a couple of thing:
-Stats
-Typing
-Movepool
-Perk of this pokemon over other similar pokemons
Kyurem is bad in the last 3