(lost my first draft of this and died inside)
Canon
FireSpotted - Gross ship. Spottedleaf is a huge creep who couldn't take no for an answer. I bet she would be following him around in StarClan like a lost puppy if she hadn't been iced.
GraySilver - They hardly interacted on page but are always shoved down readers' throats and hailed as the ultimate forbidden romance in articles and whatnot. Though stuff from GV made me dislike this ship a little less.
AshSquirrel - Gurl need I explain
BrambleSquirrel - ^
NightCrow - Toxic on both sides.
JayHalf - Literally why? Jayfeather honestly did not need a love interest, and this is coming from someone who ships JayBriar religiously. It's rushed and hardly makes a lick of sense. Half Moon doesn't even love Jayfeather. She loves Jay's Wing, and straight up calls him that in TLH when she sees him.
LionCinder - All that drama and will they won't they stuff and they still had zero chemistry. I feel like I wouldn't dislike this one or Cinderheart herself so much if they cut back on all the filler. There was so much of it and it ultimately served pretty much no purpose. Those pages could've been used to fix the messy ass prophecy or flesh out the DF war plot.
TurtleTom - Abusive and gross.
LilySnow - GAG. Erins please. I personally ignore the family tree pre-TPB because it's a mess, but come on now. Not only first cousins but also foster siblings, long after families have been established!
YellowRagged - Toxiccccc. Raggedstar is such a tool. Spiteful and always talked down and ignored Yellowfang. He cut her off from Brokenkit's life then came crawling back for help when shit hit the fan. I'm glad she rejected him and didn't really mourn his death.
StormMoon - Imagine treating your brother like trash and constantly abandoning him for someone who could care less about you at the end of the day. Felt like Storm only liked her because she stroked his ego.
LeopardPine - Pinestar is old enough to be Leopardfoot's father. Heck, I'd say grandfather. It honestly felt...I don't know how to describe it. Loveless, I guess? Like Pinestar clearly liked a kittypet he met twice or thrice more than Leopardfoot. Then at the end of his book, Pine basically says "k bye" and leaves her with their DYING kids. I don't hate Pinestar, but I hope Leopard doesn't really talk to him StarClan because that was just a huge yikes to read.
MapleApple - Pretty obvious why
AppleReed - Apple is cheating trash. Reedshine deserved better and doesn't deserve the flack she gets either imo.
Non-canon
FireCinder - I've read TPB 2 or 3 times and still don't see those romantic signs. I also dislike how Cinder is often watered down to 'girl with broken leg who cries over Firestar in the medicine den', at least in the past.
DustSand - Was a one-sided high school crush at most.
SwiftBright - I don't mind AUs and whatnot, but I've seen people genuinely believe they were a thing (usually the younger YT crowd tho). Swiftpaw has zero personality. He exists to die, so the readers/characters will be shocked by Tigerstar's cruelty. Just because they went to fight the dogs together, doesn't mean they were in love??
StormSquirrel - Boring as hell, one-sided, no development, and made Stormfur look like a hypocrite with the way his was getting in a huff over Feathertail and Crowpaw.
ShrewSquirrel - Like Swiftpaw, Shrewpaw has no character. I didn't know they were even acquaintances with each other until that line saying they were friends was pulled out of thin air. Then poor Shrew is killed off and promptly forgotten. Not to be rude but it feels kind of like a last resort ship, since all Squilf's other main ones are trash.
MoonSquirrel - Gurl why? I get people don't like BrambleSquirrel, I don't like BrambleSquirrel, but come on, why?
What
fishbreeze said. I like to call them spite ships, because they are usually shipped out of dislike for another character. NightLeafFeather, MapleReed, AshBramble, stuff like that. A lot of Squilf ships nowadays too, like MoonSquirrel and DaisySquirrel. They usually just don't work. Or feel shallow, especially NightLeafFeather.
BlossomIvy - Blossomfall had/has a dirty attitude and bullied Ivypool, but because they talked once in the tunnels they are soulmates ig. If Blossomfall was male I feel like this ship would be a lot less popular or not even a ship at all.
MapleFreckle - Frecklewish attacked Mapleshade, called her kits creatures and stood by as they drowned. Mapleshade tracked her down, lured her to her death and taunted her as she screamed for help why is this a ship please I'm so confused-
JaggedRainswept - Their whole relationship screamed little brother/older sister or nephew/aunt. Where's the romance?