Don't use Tailwind, it's garbage.
Do you have a personal experience you would like to share?
Personal anecdotes, development experiences that made you feel that way.
Then with flex box it lacks a great deal of customizability when it comes to controlling how space is distributed across elements.
And somewhat bigger picture, I'm looking to use less tooling and preprocessing, not more. CSS has come a long way to where we can now get rid of SASS, but instead Tailwind is replacing that step with fullying buying into the whole webpacker tool chain. If you're already really into webpacker that's not a huge issue, but brining along node and webpacker just for a CSS library is a bit much.