Trouble with Arc 750 Sparkle OC and Ryzen 5 5600X3D stuttering and low FPS

I hooked this up on Christmas and tried out Fortnite and I had a bunch of lag and stuttering, even on 60fps medium settings.

Is this a bad combo? I have it on the B550 Plus WIFI 2 mobo, and I thought this was going to be good graphics, but I was really disappointed. What steps can I take to troubleshoot this?