great sound in the OP's link
aside from the obvious detuned chorus sounds, it sounds like there is distortion coming from multiple parts of the signal chain
it might be worth experimenting with stacking or paralleling different fuzzes
pretty sure full drive or tubescreamer aren't going to be a big contributor sonically, but you never know - if you really push out the level from one of those into a fuzz it can create some of the crumbly irregularities apparent in the recording
regardless of what she used in the studio or uses live, i feel like the Midfi Demo Tape fuzz could be useful in getting near that tone. also velcro type fuzzes like the Fuzzhugger Velcrobot...and the SS/BS Fuck Overdrive. or Death By Audio stuff, or...this could degenerate into another long list of really cool fuzzes
(i'm sure other people can list some others like #rip, Part Garden, Failed Transmission etc.
)
also, def try voltage starving any fuzz, whether it's got the ability to do that in the box, or by using a power supply with a starve function, or a separate starve pedal like Dwarfcraft used to make....
also also - blast the front end of the fuzz either with an od/distortion or a boost. imo opinion the pure volume/gain from the boost is the critical factor here, although any inherent eq or shaping on the boost/od can be used to coax out the over-gained crumbly qualities in the fuzz (bass boost being better than treble boost for this use ime). Clipping in the boost isn't as important, and can actually be counter-productive depending on the stack. you'll have to play around with this some to find the zone - too much and you're going to get synthy sounds and squelch and feedback, but usually there's a spot where the attack starts fragmenting but it still just sounds like a fuzz sounding like an amp about to explode
"In a moment of unparalleled genius, Noel Parachute headed off this potential disaster by unplugging the microphone."