Right there with you. Suffered with fractions in 4th grade, did okay from there until trig in high school (sophomore year?), then failed hard in calc 1 over the course of 5 undergrad tries. Finally got it, but damn, my brain could not handle the theoretical stuff. Maybe methods have changed in 20+ years, but that shit sits with you.
It’s not a full size vacuum, but I just picked up a Roomie Tec Stick Vacuum during Prime days for $45. I just looked on amazon.de, and there’s only one Roomie Tec vacuum, not the same as above, but it’s been good enough for a 500+sqft basement with a few throw rugs and 2 cats worth of fur.