Zoom app on Linux with high resolution looks ugly

I downloaded Zoom 5.11.1 (3595) and installed it on OpenSuse Tumbleweed today. It kind of works, but it looks really ugly. I'll attach a screenshot. You will see that the whole app is magnified and the buttons and many other elements appear blurry. Look at the browser window on the left for comparison to see what size GUI elements should normally have. I can't even fit all options on the screen when I open the settings dialog. Previously, I used an older version of Zoom on the same hardware with the same screen resolution (Kubuntu, installed in 2020, I think), and it looked just fine, without any zoomed (ha!) GUI elements. How can I fix this? It's a fairly vanilla operating system, which I installed only last night.  The screen resolution is 3840x2160. Thanks!