I just saw an estimate from Nationwide Insurance – Holy Eff

Nationwide claim: Half the siding was blown off the house, and the Nationwide estimate was sub 3k, with incorrect measurements. Going back and forth with them now, moving their estimate to sub 18k, but they are still omitting a lot of line items. Not to mention their line items are not even in order. Is this everyone else's experience with Nationwide or is this a one off?