Knurling confusion

Hey, I was hoping someone here could help me because I'm losing my mind over something that seems like it should be simple. I'm a new machinist and this is my first time tackling knurling. I have a single wheel bump style knurling tool with a diamond shaped 20tpi wheel inserted. When stationary, the knurling produces is great, but any time I try to feed to make a larger knurl, it just comes out awful. I've played with feed rates, speeds, and depth of cut. I've gone online to look for answers but every source I find either disagrees with every other source and/or just doesn't work when I try their methods. The best I've gotten so far is the image attached. If anyone could give some advice or point me to somewhere that can actually help, it would be greatly appreciated. At this point I just feel like I'm running my head into a wall.