On linux, the 'normal' way to move files is using the terminal using 'mv'. On Windows, the terminal is available, but the main interface is the UI. It's easy to move one file. It's even easy to move several files 'next to' each other in the window. It's not easy to move files matching a particular name, or across multiple folders.
So usually what happens is I have to find (perhaps even purchase) a purpose-built utility to do exactly what I want. Or, sit there and move files. Like ctrl+click on them (that interface is terrible by the way, because one click makes the entire selection go away... who thought that up?) and then move them. What other way is there without delving into automation? Windows Explorer cannot even do the most basic selection of 'select all files with NNN in the name'. It's completely useless for anything but the most silly of operations.
Also, if you have to do actual work moving files between different filesystems or across network filesystems, it becomes even worse. You have to find something compatible with Windows, install it. It's probably some ad-containing shareware non-sense, so you pay for the license so you don't get bombarded with ads, a browser toolbar, and whatever other nonsense the MSI decided to install. Then, after about 30 minutes of downloading, installing and endless clicking on the 'do you want to allow this software to do blah' (which I never really read and click by default), it may or may not work.
On linux, it's just mount.
I don't really get the complaints about linux being hard to use. Different sure. But if you're used to it; if you grew up with it, it's mind-numbingly easy.