The cited behavior is egregious, with Flaherty issuing orders and requesting specific takedowns, and doing so in an unprofessional and threatening manner that shows he is unfit for office. It's clear overreach beyond broadcasting the Executive's concerns about public health and requesting that companies do their part to help.
The injunction may go too far in the other direction (but it is temporary), in the final ruling maybe less limiting to the Administration, but behavior like Flaherty's should be reined in.