These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Chronicle and Katejina arguably get this too. The former dies, the latter does not but still gets a miserable end.
Complete Monster: Big BadFonse Kagatie. The Prime Minister of the Zanscare Empire, he cynically exploited the messianicNewtype Maria Armonia's harmless pacifist cult to create a brutal military dictatorship, with Maria as his powerless figurehead. Whilst, as the de facto ruler of Zanscare, he was responsible for green-lighting all of its atrocities (which included the mass execution of dissidents by guillotine, burning entire towns to flush out the League Militaire, and genocide by giant motorbike), his worst act by far was creating and deploying the Angel Halo. The Final Solution to Zanscare's war with the Earth Federation, the Halo was a psychic Doomsday Device designed to wipe out all intelligent life on Earth via Mind Rape, allowing Kagatie's empire to move in and take the planet unopposed. For extra evil points, its power source was Maria (later replaced by her eleven-year-old daughter) and thousands of her followers, who he tricked into believing that they were broadcasting messages of peace and goodwill rather than orchestrating a total planetary genocide. This also meant that they served as Human Shields for the Halo, ensuring that every bit of damage it took was measured in innocent lives.
Not just as earrings, but pretty much everywhere on her.
These wigs. These old fashioned, really stupid looking wigs. Wigs have been a fashion statement for centuries, and are still used today in British courtrooms, but they generally look considerably more stylish than the ridiculous, spidery affairs the Zanscare elite are afflicted with.
Note that the bells are explained as being linked with crazy!Fuala's obsession with the guillotine (they were the same kind of bells worn by the ones to be executed).
Katejina deciding to sicc some bikini-clad soldiers with Anti-MS weaponry on Uso while he is in his Gundam, although given that the chains of command had basically broken by that point and Katejina was so far off the deep end the fact it was a terrible plan that made no sense was entirely the point. It also depicts how horribly brainwashed the few remaining forces of the Zanscare are for even being willing to participate in such an attack.
There's a few others as well: Chronicle's death being ruined by a THUDright before the Eye Catch is a good exemple.
Arbeo's isn't better: look at this face ! It's easily one of the few deaths of the franchise that can double as a funny.
Note that even today those types of wigs are used in Britain by judges, so it's not completely outlandish. Still weird for non-Brits, though.
Nightmare Fuel: Deaths in this series are not only very sad and very common, but often are utterly anticlimactic. Mueller Migel, Uso's mother, got the worst: Being decapitated by a mech's tire in the middle of a Hostage Situation? In front of your kid and his friends, right before a ceasefire, and the only the only thing that remains is your helmet with your severed, bleeding head inside, which is then recovered by your 13 year old son? What the FUUUUUCK?!
The mere concept of the massiveMind Rape device known as the "Angel Halo" is terrifying. Think of it... First of all, there is absolutely no reason for the military not to use it since it produces no collateral damage, cannot be defended against and there is no chance of a mutually assured destruction scenario as with colony drops or nuclear weapons: in other words, it's the perfect weapon. Second, consider the terrible positions of everyone involved on the Halo itself — highlight, read, and have 'sweet dreams:
Are you the Newtype directing it? You'll be responsible for massively mindraping either one person or everyone on earth while "feeding" on the powers of 20.000 "physickers". Oh, and if the psychickers die, your empathic powers will make you feel these people's pain and deaths even if you're passed out, due to the strain of merely being the Halo core (Poor Shakti.) And we're not counting all of the psychological damage you will sustain as well...
Purity Sue: Deconstructed horribly. Queen Maria is kind, gentle, naive, a powerful healer and Newtype... and a total puppet of The Empire behind her, which causes her lots of pain and drives a good part of the plot.
The Scrappy: Katejina, for what she later become. For some, so does Shakti.
Love to Hate: ...on the other hand, Katejina is also one of the most memorable Gundam villains because of her evilness, and has quite a few fans in Japan and on 4chan's /m/ board.
Tear Jerker: Lots, but the most poignant one is probably the one where all the old guys take over the crippled Reinforce Jr. and use it to ram the enemy flagship.
Unfortunate Implications: Anything regarding The "Bikini Babe Assault". Half naked girls trying to kill Uso using their nudity to distract him, but they are all easily killed by his Gundam... Uh, yeah, nothing to see here!
Although it's worth noting that there's very little actual fanservice to this scene. The women wear bikinis, but aren't shown in sexy poses or closeups. The intentions of the scene do probably come off as being horrible though. In short, the show is trying to depict Katejina trying to distract Usso with women, tries to not depict it sexually to the audience, yet it hasn't gone over well.