Key to this is framing the "take control" action as a "positive" outcome enabler will facilitate action, as Kaj and PJ have already told us.

Actually, positive framing doesn't help -- it just intensifies the conflict and the need for willpower.

What does help is fully engaging with the flinch in order to locate the center of the "ugh field". When training people, I look for the flinch and then immediately steer them towards it.. Avoiding the feeling, OTOH, ensures that you can't access any of the information that creates the feeling in the first place.

(If you've looked at the seventh chapter I sent you, you'll have seen both my advice to "lean into the pain" to "find the fence", as well as one method for dealing with the most overwhelming types of "ugh".)