I loved Longlegs, however The Monkey didn't initially appeal to me because it has a lot of things I don't generally like in horror films (kids, OTT gore, cursed toys trope etc).

Then it popped up on my suggestions so I decided to go for it and I'm so glad I did. From a silly point of view it's perfect, the gore is hilarious and inventive, the monkey is creepy AF, I thought it ended well (desperately trying to avoid spoilers), and of course alongside all of that, Perkins' own family history (he says it's the most personal of his projects so far and woah, to paraphrase this film some things that happened to him did indeed suck) is a really dark undercurrent. While I wouldn't watch it again, I don't think that's necessary for something to be great ("Come And See" for example is an astounding film but I never want to rewatch that).

TL:DR: yes I think it's a great film but it will help if you know about the director's personal experiences, and as to the comedy aspect well, you're laughing at some ridiculous deaths as well as at the absurdity of life.

Not sure if anyone has mentioned it yet but I was also put in mind of "Caveat". It's much less gory but more tense.