after a lil searching around i found a website that just told me to delete the photoshop preferences so it just resets photoshop. And no you won’t lose your plugins or brushes etc.
1) Close Photoshop, and 2) Hold Command + Option + Shift (Control + Alt + Shift, PC) while you restart Photoshop.
boom, pixelated brushes are gone.
if anyone knows WHY the pixelated brushes even happen, I’d love to hear it!