In case I misunderstood the topic, here are some others. Boy, FFXIV is full of them.
Lyse.
Obnoxious, flanderized red herring character with a really unfulfilling twist. Doesn't earn her position in the slightest. She's a dimwitted bimbo fighter for 100+ hours you know her (which is fun because she's fun at that part), she has no place being a politician, let a lone running a governing body.
Which leads me to.
Wuk Lamat.
In many ways she's Lyse on steroids. Dumb as a rock, kind to a fault, and generally a good person. However, unlike Lyse, we don't spend 100+ hours getting to know her. She spearheads the main story while having a really basic "genki action girl" archetype which is really uninteresting. She earns basically ZERO of her accolades, and the few she does earn, she does so OFF-SCREEN. I don't mind my character taking the backseat in the main story, in fact I welcome it, but I don't want have to follow a shitty character around instead. For the community, her poor writing is seemingly what broke the camel's back,, but there's one I dislike infinitely more, which is...
Zero.
This stupid, uninteresting, boring bitch shows up, makes the entire story about her, then fucks off a year later. The living definition of a Poochie walking on Eorzean soil.
She's the "let's teach a robot feelings" archetype, but unlike good ones, like Tin-Man or Aigis (who learned that they had emotions all along), she's nothing but a shitty plot hole, contradicting the logic she explains makes her and her world at every turn. She reeks so much of writer's pet that I genuinely can't stand it. She made me quit playing several times because the story was so utterly dogshit around her. She's easily the worst character in the entirety of Final Fantasy XIV, and one of the worst characters in Final Fantasy, period.
Endwalker sucked, and the post-launch patches promised adventure. Instead I got stuck feeding overly dumplings to a LITERAL personality black hole (she literally moves through black holes), while having the entire already flanderized cast talk about how quirky and cool she is, while she learns how to help you take out the trash without requiring payment for it.
I haven't played Persona, but it seems like they intended for that character to be somewhat unlikable.
I don't think so, personally. He just has certain traits that aren't innately positive, but I think that every good character should, because it makes them feel more real. His positive traits shine through way more, and it's kind of a theme with the "best bro" character, where they've dumbed them down more every game. In P5, the entire cast shits on Ryuji relentlessly, but his only sin is being nice and kind of stupid, which doesn't feel like comic relief, it feels like they're bullying him, but he just toughs it out. Fans love Ryuji though, it's just the characters in-game who shit on him a tad too much.
In a way I kind of think it's one of those instances where nerds dislike a character because they're either not funny enough or hot enough or badass enough, so they have an easier time finding them "bad", because compared to their peers they have more of an "everyman" vibe.
Sorry for the long reply, I'm tired so it's hard to explain, and probably not that interesting.