I think it's ugly. It introduces uncertainty about the exact semantics of statements (as in does this code really do what I think it does?). It doesn't add any capabilities which JavaScript doesn't have. It makes debugging more complex, because errors are not actually happening in the code you wrote, but code a compiler wrote based on something else.
It introduces indirection and complexity, while adding zero value. As such it's on overall a negative value proposition, and that's everything it takes for me to decide something is not worth it.
I find it a perfectly rational decision and attitude.
While I'm not a fan per se, at least other transpired languages like typescript and clojurescript at least adds new capabilities to justify the additional complexity.
