I am sorry you had issues with the install. Thank you for the feedback.
If you use the Destroy_data = no during install, the HDP installer will not automatically format the NameNode metadata. This allows for the HDP installer to maintain prior existing data. We'll make sure it is mentioned in tour documentation so that it's clear what the behavior will be on using Destroy_data = no.
The installed Flume service is not enabled by default upon an HDP installation on a Windows Server node. It needs to be configured and then enabled. We'll clarify the documentation to call out these enablement steps.