Unfortunately, there is not much we can do about this, as we have a dependency there.
We recently opened the ScrollView API to give control over the scrolling speed, so that users can adjust it based on their project's specific conditions. The attribute is `mouse-wheel-scroll-size`, or `mouseWheelScrollSize` from code (see https://docs.unity3d.com/ScriptReference/UIElements.ScrollView-mouseWheelScrollSize.html).
This was added as an easier way to set the line height, that was previously supported with `--unity-metrics-single_line-height` in uss.
Alternatively, if there is no use for the EventSystem with UI Toolkit (when not using UGUI at the same time as UITK), there is a way to manually disable interoperability with: `EventSystem.SetUITookitEventSystemOverride(null, false, false)`