Syllable Speed Confusion

I had been having a very difficult time with writing in the past, one reason being that when I would read my prose to myself in my mind, I would read unstressed syllables with the wrong speed, often with a variety of speeds. When I would think of an anapest, I would think of something quick da-da dum. But the right way to pronounce an anapest is not with so much rapidity on the first two syllables, as my new understanding tells me.

My inability to read unstressed syllables with the right speed, I think, weakened my ability to make my prose flow smoothly. Lately, I had come to a new understanding of auxiliary verbs and pronouns, that they are stressed, because I began to pronounce them with the right speed, having been pronouncing them too fast. But that they are stressed is not the case; it is simply that all words except content words are to be read without stress and with the proper speed. Failure to do this will hinder editing properly, due to a lack of ability to pronounce words and syllables properly, whether silently, or aloud.

Has anyone else struggled with this?