Good evening and welcome back!
Thank you for reaching out to us.
I would love to help you with this topic.
This issue is usually caused by plugins that add extra admin columns (such as Yoast SEO).
What is going on is that when the number of columns increases, there is no longer enough space for the display.
As a result, the columns get squashed and display is unflattering.
The solution is simply to deactivate a couple of display columns using screen options (see screenshot) while you are in the events list view

Let me know how that goes.
Best regards,
Geoff B.