According to your description, it is not broken, it is just low performance and running slowly.
Unfortunately, there is not much similar feedback, and it is certain that low performance due to the use of large numbers of data tables in Excel is inevitable.
I recommend that you do not use too many formulas in a large number of data tables, especially loop or iterative formula references.
In addition, if circumstances permit, you can also try a higher version of excel.
If the response is helpful, please click "Accept Answer" and upvote it.