Trying to delete pages of uploaded crypto trades is slow. There doesn't seem to be a "Delete all", or way to mark multiple trades for deletion. Very slow - any tips?

The cryptocurrency trades will be reported on Form 8949 (Sales and Other Dispositions of Capital Assets), so you might try deleting that form to get rid of the trades. However, if you have non-crypto capital activity also reported on the 8949, you will lose it and have to re-enter it. 

Here's how to delete a form in TurboTax.