Cycling accessories in general.
I hit this pain barrier each winter. Super expensive lights which smash so easily when you drop them, attachments for the lights which wobble and then fall off, lights which you spend hours fiddling around with in the dark to attach and remove and bike locks that are impossible to operate in the dark.
Hi visibility covers for your day pack that are fiddly to put on and remove and render the pack impossible to get into once they’re in place.
If you see someone wearing head to toe fluorescent waterproof gear, outside the tube station swearing near the bike racks - that’s me.