It's fine, it feels dated, going back to the original Delphi / VB style of RAD tool with form designer/code editor as floating windows etc.

Note that if you install the "anchordockingdsgn" and the "dockedformeditor" packages you will get a UI that uses a single toplevel window with all the previously floating windows being docked inside it (you can still un-dock them) and a form editor that is inside the window (without the "dockedformeditor" you can still get the single window for the IDE but form editing will happen in floating forms).

Personally i prefer the floating windows UI as i overlap windows a lot (and i'm used to it - also i have a dedicated virtual desktop for coding which helps), but there are enough people who prefer a single window UI that this should work without issues these days (it used to be somewhat very unpolished at the past, like installing the package and having a shotgun blast in the IDE panels :-P so you'd spend a few minutes moving and resizing the panels in sane places).