If you want IDE like features, then of course an IDE is a better choice. I've never understood why people and to extend vim to try to make it half of an IDE.
which i translated to "cluttered ui" and "not responsive".
Vim can do a lot of stuff, but its UI is very minimal. That's because it recognized that there are already many buttons right under your fingers, so there's no point in putting more of them on the screen.
GUI is more discoverable than terminal software. You open a project with WebStorm, it can already understand it, and you can configure a build process in a few clicks.
JB also has some glaring holes, like the inability of easily specifying an env file to load when running projects from the IDE runner (and the plugin to do this was half broken with the 2023 versions)
So, no, an IDE is not a better choice for everyone who want's "IDE like features". It is for some, but not everyone.
Because vim ships with any *nix machine and provides a consistent experience no matter where you use it.
Vim is the DE part and people add plugins or whatever to enrich the text editing experience with LSPs or other language aware plugins, and the I in IDE is in the form of the integration with the tooling already available on the host.
This[0] might shed some better light on the "why"