Almost every single paragraph you wrote stems from your personal opinion. Not a single claim you made was substantiated by any sort of supporting data. Have you even preformed studies beyond "I don't like it and saw some students dislike it"? Have you studied how proficient users use it? As it stands, your comment is a long winded complaint that blender's interface design doesn't conform to your personal tastes.
I, like GP, think Blender's interface is excellent given what it enables. The interface is consistently designed and well thought-out (mostly). The vast functionality of what blender can do is never one or two keystrokes away thanks to pan focus. Information is also grouped consistently and laid out clearly and logically. Pans allow you to easily arrange and rearrange your workspace according to the task at hand. Even menus and controls are (or can be) laid out clearly instead of being hidden deep somewhere because authors thought they wouldn't be used frequently. The interface was designed for serious long term users. It was not designed for casual or one-off users.
I just hope you are also as eager to teach your students about interface design requirements inherent to heavily-used complex software as you are to share your objective opinions.