Xsplit Broadcaster as webcam in Zoom have bad quality

The potential of having Xsplit Broadcaster as webcam it´s wonderfull but i just can not give away the quality of image because i´m a teacher and i normaly share my screen for content. What happen it that the image of my screen gets fuzzy and almost impossible to read text… Are you aware of this? Is there any solution?
Thanks in advance!
Ricardo