Update ruined all the designs

My deepest appologies about your experience.
1. You can revert to an earlier version of Elementor: https://docs.elementor.com/article/382-rolling-back-to-a-previous-version-of-elementor
2. We created a fix for some of the issues, and are working on another fix. Read about the latest in the community: https://www.facebook.com/groups/Elementors/
3. Visit our FAQ page which also has a step by step guide to help you avoid issues: https://docs.elementor.com/article/677-faq-for-elementor-3-0

Again, my deepest apologies. Bugs and issues are unfortunately inevitable when it comes to updates, especially major releases like 3.0. I hope this helps you solve the issue.