Tables should be the full width of a Doc with all of the columns defaulting to equal width and resizable while maintaining full width. Tables should not be fixed width!
Or just add a simple button like Notion "Fit Table to Page Width" which then automatically resizes the table and columns.
Right now in ClickUp I have to manually resize each column and it never is quite full width or symmetrical, and doesn't resize from Default page width to Full page width. You also can never have two columns exactly the same width.
Moving from the simple, fast, and elegant tables in Confluence over to ClickUp has been a shocker. All of my migrated tables look horrible in ClickUp Docs.
If you want to see how to build tables right, look at Confluence. It doesn't get any better. And header rows would be so simple for you guys to add.