generics supersedes them. overloads are a legacy feature that was made available in Typescript before generics were a thing. Overloads are mostly a C#/Angular leftover. Simply put: there are no problems that function overloads solve better than generics.
overloads clutter the code and make it more verbose and harder to read, which increase the cognitive overload.
overloads clutter the VScode tooltips.
overloads force you to write non-standard javascript syntax.
overloads are a bad practice. The flexibility that they enable also enable your team to write inconsistent code. Which is exactly the problem that ESLint is designed to solve.