For me it’s just a vowel sound and a T consonant on the end, the tongue isn’t closing the airway enough to approach a consonant on the vowel sound. The restriction is at the back of the mouth, but it certainly doesn’t feel like gagging

A glottal fricative is the consonant at the start of “happy” or “hello”. The gh I’m thinking of is a voiced velar fricative. The voiced counterpart to the ch in Scottish English “loch” or the German “Buch”

Ok now be honest, have you been sitting by yourself making “awgh” sounds?

Well of course! Few things make me so grateful to live alone as any time I’m trying to figure out the specifics of how I say a thing