In most reasonably-sized websites, Tailwind will decrease overall bundle size when compared to other ways of writing CSS. Which is less code, 100 instances of "margin-left: 8px" or 100 instances of "ml-2" (and a single definition for ml-2)? Tailwind will dead-code eliminate all rules you're not using.
In typical production environments tailwind is only around 10kb[1].
You're doing it wrong. Tailwind is endlessly customizable and after compilation is only kilobytes. But yes lets complain because we don't understand the tooling....
Don't get me stared on how ugly the HTML becomes when most tags have 20 f*cking classes which could have been two.