1: yeah not much stuff can switch IN on crawdaunt/hoopa without a doubt (2+ adapta crawdaunt kills basicaly everything that tries to switch into it or is slower than it) but outside of their excellent stall breaking capabilites they don't have much in the boat.Your perspectives on both Crawdaunt and Hoops are heavily flawed. While both suffer heavily from having bad speed tiers and defensive typings, both of them still justify being ranked owing to their absurd wallbreaking abilities.
Starting with Crawdaunt, the lobster is extremely hard to switch into owing to its incredibly strong Knock Offs, Crabhammers, and even Close Combats, especially under Rain where, while it finds itself competing with Manaphy for a spot, its ability to act as a more direct and potent wallbreaker than Mega Swampert can be appreciated, especially vs teams with ( Slowking/Amoonguss/Kommo-o cores or FiniTang cores which have become increasingly common and Pert finds itself struggling to break) as can its extremely strong Aqua Jets, which outmuscle even the likes of the rising Urshifu Rapid Strike and give it a very powerful revenge killing tool. Though, as I said before, its mediocre defensive typing, low speed, and general competition with other Rain staples and other Water wallbreakers like Urshifu-RS and Manaphy means it finds itself in a rough spot, its sheer potency means it is "worth mentioning" and certainly more than merits a place in C
Hoopa-Unbound is in a similar boat as Crawdaunt, being a slow but extremely potent wallbreaker, except it exchanges a place on rain and an absurdly strong Knock Off for even better offensive stats, a wider movepool, and being even harder to switch into.
I don't think many people would argue that Hoopa-Unbound, whether it is Specs or Band, is one of the hardest Pokemon to actually switch into in the tier, with either Hyperspace/Zen/Gunk/Fire or Drain and Psychic/Dark Pulse/Focus Blast/filler having near perfect coverage for the entire tier and hitting absurdly hard thanks to 160/170 offenses. In particular, these traits serve it well in its main role of utterly dominating defensive cores. Most defensive cores in the metagame, whether they be SlowMoonguss, TangFini, PexCorv, or even full on fat/stall teams, utterly struggle to deal with Hoopa, getting OHKO'd or 2HKO'd by its coverage or even getting crippled by niche options such as Trick.
Speaking of, I want to address your hazards argument. While you argue that teams with Hoopa struggle with hazards thanks to Hoopa's prediction-reliant nature, I would argue otherwise, since the specific structures Hoopa fits on tend to feature pivots that either don't really mind/can remove hazards (Corviknight) or flat out ignore them (Slowtwins/Blissey/even the niche Teleport Clef). The only exception to this I can think of is Mega Lopunny. However, this leads into the main point of this paragraph: Hoopa, thanks to its strong offensive stats and great coverage, forces a lot of prediction and more importantly, switching. Owing to this fact, while Hoopa may hate switching into hazards, it utterly loves having team mates that can supply them, since the combination of hazard damage and Hoopa's raw power can whittle opposing teams down incredibly quickly.
In terms of partners, Hoopa really loves not only slow pivots like Corv, Rotom, Blissey, Slowtwins, and Mega Scizor, but also fast ones like Lop, U-Turn Gren, Lando, and Zeraora. In general, Hoopa finds itself fitting well on teams that focus on keeping up momentum with pivots and using wallbreakers to help their fast mon clean up (usually Gren, Zera, Kartana, Mega Lop, etc), and it does well on these builds.
That being said, Hoopa has a ton of flaws. Its defensive typing is terrible, it has a proclivity for being Pursuit trapped, it is very prediction reliant, it desperately needs help getting in, and of course it is really slow.
However, in my opinion, a flawed Pokemon that needs a good deal of help to perform a specific niche, but can perform said niche well and with a level of consistency (in this case being an extremely hard to switch into wallbreaker that can decimate fat squads) is the definition of a C rank Pokemon, and thus, Hoopa-U should remain in C
Also quick aside but Analytic Zone is a bad meme
Finally, I echo Optify's nomination for Skarm to B+
The most annoying thing is ninetales alola setting up aurora veil in front of these slow pokemon, 1 of which, crawdaunt, does LEARN brick break but people don't USE brick break on it (or really anything because overall cc is a better option)
Also analytic zone is NOT a bad meme as magnezone is slow so getting big buffs in damage is n o i c e