There's a lot to unpack here lol. So an incel is a misogynistic young man who's upset women won't have sex with him. Excel is a software program. And a fig is a fig. An incel assumes every interaction with a woman is a date, Excel is notorious for incorrectly autocorrecting inputs into date format (like day-month-year), and people confuse figs for dates. Sheets are never clean is an inappropriate joke for incels, and sheets is short for spreadsheets in Excel. Figs can sometimes have dead wasps in them, and wasp can also stand for White Anglo-Saxon Protestant. Lastly, if you eat a fig, you might make a mess on your desktop, and Excel files can be messy on your desktop computer.