Having the toilet's handle fall off in my hands. Apparently it's a needlessly complicated process to replace it while maintaining my warranty.
A difficulty I never expected to face in my adult life, much like my trials and tribulations attempting to cancel the local paper's delivery while I'm attending the theatre this weekend. I rarely actually read their publication in the first place, it's almost entirely advertisements for businesses I have no possible need for.
Honestly, you just don't see these problems arising until they do. I'm more readily capable of accepting the possibility of terminal illness, the Mayan apocalypse, or that we're all in fact within the Matrix than the vexing irrationality of my home's electric grid or the fiendishly nihilistic waste management calender my municipality has devised. Disaster and suffering are well within my philosophical wheelhouse, paltry nuisances that pop up out of the ether are not.