Why Trip is hated... Uuuuuh...
- He's basically Paul's illegitimate twin brother with lighter colors. COME ON, people. Same facial expressions, same speech manners, same attitude, same look... Ok he isn't the same trainer. That's the problem: ...
- ...HE'S AWFULLY BORING, he brings NOTHING to the show, he's just there, he talks, well, nobody cares, nothing happens, nothing moves. Good, boy. Bianca is a good character, she's clumsy and she's cute because of her immaturity. Georgia is a good character, she's fierce and she has a fascinating attitude and rivalry with Iris. Burgundy has a wonderful attitude, she's funny and she's not unidimensional. (Her battle against Iris with Dewott was absolutely priceless).
Trip, you have no personality (Beating Ash because nothing and then helping him with Oshawott... well, you hate the guy or you love him?), no character trait (Photo, duh), no backstory (Sorry, boy, but your tearful love story with Alder's Bouffalant wasn't that poignant), NOTHING. You're like a guy they pick in the audience and said: "You'll be Ash's Rival because of reasons"
- All his relationship with Ash feels FORCED AS HELL. Gary has a past with Ash. Paul and Ash has opposite point of view. Trip has WHAT with Ash? They're trainers. Good. Then? They’re boys, cool. They have some similar Pokemon, Snivy, Pidove, ok. That’s a good start! *sarcasm*
- He has nothing to do with any of the cast, he don't talk to anybody but Ash - and talk is a big word when these conversations are nothing but "HAHA IMDA BEST U CRAP IM GONNA BEAT YA BECAUSE OF REASONS LOL"
- I don't care about him at all. He's here, well, ok. He's not here, same.
So I can totally understand why he is hated. It's just because he deserves to be, because he's nothing but a spot anybody else can fit in. That's just my opinion.