Dude, I don't give a shit about which ships you personally like or hate. And if you want to draw a fuckton of shipping pics or porn or write a fuckton of shipping stories or porn, you should go right the fuck ahead, because at least that's creating shit and practicing skills.
But "muh ship didn't happen" is not a fucking legitimate criticism of a show that's not a fucking romance novel like Twilight or a soap opera. PB was an older girl who was a crush, the show toyed with her becoming younger briefly (which was just fucking creepy) but didn't have a premise that this was going to be some fat houwife's favorite love story only to suddenly yank the smelly bathroom carpet out from under her. Finn moved on to FP literally years ago, in 2012. Them handling that plot badly I can see being frustrated by, but suddenly acting like the reason the end of the show was bad was that a ship that was sunk and finished 6 years ago didn't happen? For 3/4ths of the entire series run, that ship was dead.
So you're really telling me that the only thing worth enjoying about Adventure Time was the handful of episodes during only the first 2 years where it looked like this one couple was a slight possibility? That's fucking pathetic, especially if you aren't a girl who dots all her i's with hearts. You literally sound like fucking tumblr.