You can set up mount points on Linux, at least in GNOME, very easily. (It’s even fully automatic for external disks.) I’d be surprised if it isn’t as easy in KDE and other desktops too.
The problem here (at least from what it sounds like) isn’t setting up mount points. The problem is fixing an incorrect fstab on the disk that’s causing the system to hang on boot.
(This isn’t a typical situation, which is why I also asked about how the partition was added to the system.)