How to not take ageist comments personally and when rejecting guys who are younger?

Im not rejecting them for their age (unless they’re too young for me. Im 36 and don’t typically care too about age much when matching. I’ve matched recently with a guy 6 years younger, when I unmatched him for not liking his behavior; he sends me a direct message calling me an old grandma. When I rejected another guy before who was younger, he said I looked old and rusty.