This really clicked for me when I read Harvey Mackay’s daily (“Swimming with Sharks” author–oldie but goodie). He talked about reputation and had this gem from Lincoln:

“If I were to try to read, much less answer, all the attacks made on me, this shop might as well be closed for any other business. I do the very best I know how—the very best I can; and I mean to keep doing so until the end. If the end brings me out all right, what is said against me won’t amount to anything. If the end brings me out wrong, ten angels swearing I was right would make no difference.”

Execute, and continually try to do the very best for your customers and your reputation in the market will over shout any incremental criticism.