[EPS Files are terrible!]

If we're starting from Adobe Illustrator, is there a file format I need to export to in order to open it correctly in Affinity Designer?
About attachment:
This is just one small example out of many. Essentially, working with vector images from the stock market is not feasible at all because most of them are now protected by being sliced into various rectangles, making it impossible to edit millions of objects to achieve consistent graphics.

Have you any tips please?