Unless the person complaining is the person who checks your work, or there’s some reason to believe that they’d have more information about the ideal speed to mistakes ratio than you do, I suggest just ignoring it. If one or the other of my caveats is true, I suggest asking the person who checks your work for more information about the issue, so that you can see why you should want to work slower and avoid more mistakes.
Unless the person complaining is the person who checks your work, or there’s some reason to believe that they’d have more information about the ideal speed to mistakes ratio than you do, I suggest just ignoring it. If one or the other of my caveats is true, I suggest asking the person who checks your work for more information about the issue, so that you can see why you should want to work slower and avoid more mistakes.