Pixel effects derive their results from the pixel effect DPI setting and the document DPI. The result will be different for a 72 DPI document vs. a 300 DPI one. And of course there is no point in zooming in 400% on what clearly is just a small text object and then expect a detailed halftone. The type itself may need to be designed larger to begin with. It seems you have several misunderstandings about some basics here.