Happosai (Ranma 1/2)

Happosai (八宝斎) is a major antagonist in the anime and manga Ranma ½. He is the legandary perverted master of the two main characters' respective fathers Soun Tendo and Genma Saotome who returned to ruin their lives.

Why He Sucks

 * 1) The only defining trait of Happosai is his perversion. Not only that, he is extremely unlikable and his thing with outright stealing women’s undergarments (sometimes even swimsuits and skimpy gym shorts), fondling their breasts, and flipping skirts without their consent is very intolerable and creepy. There are so many things wrong with him you can’t even list them all.
 * 2) * To make matters worse, it is evident in one episode of the anime where he couldn't even last long without having a grasp on women's underwear, where he passes out as the result of giving up on his old perverted ways for the sake of pursuing a romantic relationship with Miss Midori, a preschool teacher whom is a lot younger than him.
 * 3) He is more of a plot device than a character, adding to how he is overused in the anime to the point where it gets old, and serves as a filler in general.
 * 4) There are many examples that point to him being often the source of misery for those he encounters:
 * 5) *He ruined the chance for everyone who were about to finally get rid of their curse in one episode.
 * 6) *He is responsible for teaching Hinako Ninomiya the unique ability to drain the auras of others, though this technique was used against him by her for his sexual harassment, which of course, he deserved.
 * 7) *He is responsible for naming one character "Pantyhose Taro" which, unsurprisingly, the latter hates him for and demanded him to change it. If that wasn’t enough, Happosai insisted on helping Pantyhose’s mother by bathing him, however, this "bath" was in the worst of the cursed springs that turns him into a demon creature. Although not deliberately, he wasn’t even sorry for the misfortune he caused!
 * 8) Relatively speaking, he shows absolute NO remorse for what he does.
 * 9) Even the characters in the series can’t stand him, though with the exception of two friends. Until then, he is immensely hated by nearly everyone for obvious reasons.
 * 10) He is also apparently a pedophile as he is frequently harassing Akane, Ranma (in his female form), and many other young girls when he gets the chance. At his worst, he once had Akane knocked unconscious and kidnapped her so he can sleep with her, which is unethical and downright immoral. On top of it, Akane is 16 years old, and most of the girls he normally harrases are of ages 16-19 range, which is again creepy and disturbing.
 * 11) He is selfish and lies to advance in his game. To add insult to injury, he is devoid of sympathy and is oblivious to the feelings of the people he hurts.
 * 12) He is a horrible and cruel master to Soun and Genma. During their training, he used them like tools to participate in his BS. He also used Kuno as a decoy so he could steal undies and bras for his own personal enjoyment.
 * 13) He is so immature and plays victim whenever he gets called out.

Redeeming Qualities

 * 1) Despite the above mentioned, he does have his funny moments.
 * 2) His comeuppances for his actions are satisfying.
 * 3) His touching backstory with Cologne, although he stole her mirror and other things from several other women, which caused Cologne to hate him.
 * 4) He is an excellent martial artist.
 * 5) He is at least self-aware. In one episode where he was trying to get his young self to avert his lecherous ways.