I learned this the expensive way, from a tool nobody opened twice.
The usual diagnosis is training. The usual cause is that the thing looks like it was abandoned halfway.
Why does internal software fail on adoption?
People read effort as a signal of whether something is supported. A tool with inconsistent spacing, three shades of grey and a settings page that was clearly built last says: this will break and nobody will fix it. So they keep the spreadsheet.
You do not need beautiful. You need finished. Those are different, and only one of them costs time.