Those stupid MOPAR nylon wiper transmission pivot bushings introduced in the mid 70's come to mind. I've gotten real good at scraping the skin off my hands contorting around under the dash replacing those. The aftermarket replacements barely last 2 - 3 years in any place with warm temps... i'd like to the bean counter who came up with that exquisite annoyance, especially when they fail in a rain storm and you lose your wipers...