I don't get this. I've used GIMP and Phptoshop and the UI differences are trivial.
On top of that, this tool still sits along side other single purpose tools for scaling and rotating, which are the first results if you search "how to rotate in GIMP", so why should I even expect this tool to exist?
This is not intuitive UX which is "trivially different" to PS, this is a mess which can only be learned through laborious trial and error, or reading the documentation like a book.
[0]:https://docs.gimp.org/2.10/en/gimp-tool-unified-transform.ht...
That depends on which version you use. IIRC the version in the Ubuntu/*buntu repo's have a patch to bring the UI closer to PS, at least in appearance.
There are also some functions which you have to do differently in GIMP vs PS.