Well, here are Steam and Origin running side by side on my 4K display using an Nvidia RTX 2060.
I've read about how text is blurry for some at this resolution, but blurry doesn't really begin to describe this. Even if I jack up the zoom level, it's almost just as unreadable, it's just unreadable and also larger. You'd figure that a company that peddled games could get their heads around designing a workable UI for what's basically a glorified download and chat client. Unless I have some setting wrong - that's always possible too.
Can you try the following @markholley4 to see if it improves how Origin looks on your system.
Close Origin fully.
Go to the Origin install folder and right click origin.exe. Click property > compatibility > check "Disable display scaling on high DPI settings" and set on the dropdown menu below "System"