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.
Archive Panic: All completed stories combined so far total to more than 2 million words, and that's before you add the 350k (and counting!) of the current story. Each chapter tends to be between 10k-20k, but some of the chapters in Season 2 were in the range of 30k.
Complete Monster: Kaiser Ghidorah, who is a real stepping stone from Pharaohmon and plans on invading earth. He crosses the line TWICE by murdering Sailor Moon and Cammy Hino (and Kuwabara) near the end.
Rajita General Kuiiza. He conducts sickening experiments on victims to become Orichalcos warriors and Chimeras. He also brainwashed Joey Wheeler severely to be his personal warrior and turn on his friends.
Yami Houou. Enough said.
Necromon counts due to his sick pleasure of controlling deceased warriors such as Kotori Ayami.
Sailor Charon. As two of the main villains along with the Prophet, she plans a 'Dawn of Chaos' apocalypse that will devastate all dimensions. She has a sickening fond of mind-rape such as taunting Sailor Sedna about her confidence and brainwashed Dimitri/Angemon X. It is revealed that she is also known as Sailor Chaos. The cause of all the chaos that happen in Season 3 and even much of the franchise. Plus, she's the one who murdered Cain's wife and gloats about it.