Bloat doesn't necessarily mean code size. It could also mean redundant selectors, code that is difficult to maintain, and plethora of other things. As mentioned

Bloat doesn't necessarily mean code size. It could also mean redundant selectors, code that is difficult to maintain, and plethora of other things. As mentioned previously, I'm a front-end web developer, I spend majority of my time coding graphically-heavy designs in CSS and maintaining them, as well as doing JavaScript. In my experience, Sass has been a nightmare. So far, the only people that I've heard praise Sass are back-end programmers, rather than full-on front-end developers.