Attach your workpiece to a backer strip or push block. That way when you push it past the router bit you'll greatly reduce or eliminate tearout. Routing end grain is really prone to tearout. You can make your pusher block so that a clamp can be used to hold your work to it. The clamp helps prevent the tearout more and well as making the work feed more stably past the bit and gives you something to hold onto. You can see what I mean by going to post #11 in this thread: https://www.routerforums.com/jigs-fi...r-table-2.html
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.