Hate Dumb: Go onto any video or internet thread about her and you will be bombarded by messages to the effect of "Bitch killed Kurt Cobain!" and/or links to websites run by attention-seeking conspiracy theorists showing "evidence" that links her to Cobain's death.
Despite the fact that most, if not all, evidence that links her to Cobain's death is circumstantial and probably wouldn't hold up in court, many strongly cling to the belief that she was directly involved in his suicide (With some believing that she murdered him herself) enough to make her role in it very debated.
Jerkass Woobie: Between being abandoned by her mother at a young age, growing up practically unwanted by any of her family, spending her adolescence in Juvie, having to work as a stripper to make ends meet, narrowly escaping being raped during said job and the police not believing her story, the love of her life killing himself right when her life seemed to be getting on track, and her then developing one of the biggest hatedoms in history because of it, it is inarguable that Love has lived an extraordinarily hard life. However, her generally abrasive and reckless behavior makes it difficult, if not impossible, for anyone to feel sorry for her... at least for lengthy periods of time.
Tear Jerker: Quite a few, including "Doll Parts," "Northern Star," and "Letter to God."
The recording of her sobbingly reading Kurt's suicide note to a crowd shortly after his death became public.
Yoko Oh No: Much of the Nirvana fandom hates her, with a vocal group of conspiracy theorists even insisting that she was responsible for his death.
A frequent source of controversy was the allegation that Cobain either entirely wrote or heavily contributed to Live Through This (he only added backing vocals and guitar to two songs) -- Love did not help her case by rewriting the lyrics of the Nirvana outtake "Old Age" for My Body the Hand Grenade and not bothering to explain that it was originally a Nirvana song.
That she almost seems to go out of her way to antagonize Nirvana fans and seemingly has little respect for her husband's legacy has only made things worse. She published his personal journals (Cobain was pretty anti-fame, and notoriously private), and then licensed his image to Guitar Hero, so fans can force him to sing whatever they want. Admittedly, it IS funny to make him sing GNR songs, but Nirvana fans (and former band members) were not pleased. Her habit of holding up the release of pretty much any unreleased Nirvana stuff seemingly just For the Evulz threw even more fuel on the fire.
At one point, she had a relationship with Trent Reznor, which didn't end well. Trent blames her for ruining his friendship with Tori Amos, and both of them made songs seemingly attacking Love (NIN's "Starfuckers, Inc.", accompanied by a video which involved a lookalike being dunked in a tub of water, and Tori's "Professional Widow")