I'm here to assist you in handling this matter. Let me share some information about your concern about how to bulk delete rules in QuickBooks Self-Employed (QBSE).
The option to bulk delete rules in QBSE is not yet available. However, you can manually delete it by following these steps:
From the Gear icon
Select Rules
Find the rule you want to modify and click Edit
Next to it is a drop-down where you can select Delete
I'd also recommend checking out these articles for more references about how to handle downloaded transactions: