As far as liking a movie, it's less along the lines of being an unironic liking of it and more of seeing it as "so bad it's good" but there's a movie called Blue Seagull. South Korean movie that touted itself as the first adult animated movie and it tried by way of some plot about a Korean guy trying to get back a sword and along the way there was horrible sex and generic violence. TV Tropes listed it as "so bad it's horrible" and it does show with the film having poor animation, reusing some frames, bad English subs, and a poorly explained plot as to why some sword was important to the yakuza (who get like 3 minutes of showtime) and to some American mafia backed by a company (who get no explanation as to why either of them want the sword) and a last minute ass pull in the protag getting the sword by way of a magic Buddha statue.
Why I like it was simply because of the villain, a racist American mafioso who rapes the not-love interest of the protag simply because it sounded like his voice actor was the only that gave a damn on top of the design reminding me of a cartoon villain from the 90's. Add to that subs in it making me chuckle like "Hitler died, my mother also died" to a thug the main villain kills 2 seconds later or even said villain shooting up a bathroom while going "la la la la laaaa" like he was trying to sing some kind of opera.